diff --git a/NEWS.md b/NEWS.md
index 68f9aa77..45d3ef46 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -13,6 +13,11 @@
 * Translations now live in the global environment called `these$translations`
 * A new documentation page called `?translate` contains details of how
   translations of template elements are rendered.
+- `tr_src()` helper function provides access to the source strings of the
+  translations.
+- `tr_get()`, `tr_varnish()`, and `tr_computed()` helper functions provide
+  access top the lists of translated strings. These have replaced the `tr_()`
+  strings at the point of generation.
 
 # sandpaper 0.16.1 (2023-12-14)
 
diff --git a/R/build_404.R b/R/build_404.R
index 634e4012..b0a9a6da 100644
--- a/R/build_404.R
+++ b/R/build_404.R
@@ -54,7 +54,7 @@ build_404 <- function(pkg, quiet = FALSE) {
   this_dat <- list(
     this_page = "404.html",
     body = html,
-    pagetitle = these$translations$computed$PageNotFound
+    pagetitle = tr_computed("PageNotFound")
   )
   page_globals$instructor$update(this_dat)
   page_globals$learner$update(this_dat)
diff --git a/R/build_aio.R b/R/build_aio.R
index 71295afa..60c9d346 100644
--- a/R/build_aio.R
+++ b/R/build_aio.R
@@ -3,7 +3,7 @@ build_aio <- function(pkg, pages = NULL, quiet = FALSE) {
   build_agg_page(
     pkg = pkg,
     pages = pages,
-    title = these$translations$computed$AllInOneView,
+    title = tr_computed("AllInOneView"),
     slug = "aio",
     aggregate = "*",
     prefix = TRUE,
diff --git a/R/build_episode.R b/R/build_episode.R
index 7b0aa1e0..6e722f12 100644
--- a/R/build_episode.R
+++ b/R/build_episode.R
@@ -131,7 +131,7 @@ get_nav_data <- function(path_md, path_src = NULL, home = NULL,
   pf_title <- NULL
 
   if (!is.null(page_back)) {
-    trhome <- these$translations$varnish$Home
+    trhome <- tr_varnish("Home")
     pb_title <- if (page_back == "index.md") trhome else get_trimmed_title(page_back)
     page_back <- as_html(page_back)
   }
diff --git a/R/build_home.R b/R/build_home.R
index 98b05532..ed1a7c16 100644
--- a/R/build_home.R
+++ b/R/build_home.R
@@ -46,7 +46,7 @@ build_home <- function(pkg, quiet, next_page = NULL) {
   needs_title <- nav$pagetitle == ""
 
   if (needs_title) {
-    nav$pagetitle <- these$translations$computed$SummaryAndSchedule
+    nav$pagetitle <- tr_computed("SummaryAndSchedule")
   }
   nav$page_forward <- as_html(nav$page_forward, instructor = TRUE)
   page_globals$instructor$update(nav)
@@ -55,7 +55,7 @@ build_home <- function(pkg, quiet, next_page = NULL) {
   page_globals$instructor$set("setup", use_instructor(setup))
 
   if (needs_title) {
-    nav$pagetitle <- these$translations$computed$SummaryAndSetup
+    nav$pagetitle <- tr_computed("SummaryAndSetup")
   }
   nav$page_forward <- as_html(nav$page_forward)
   page_globals$learner$update(nav)
@@ -98,7 +98,7 @@ format_syllabus <- function(syl, use_col = TRUE) {
   }
   td1 <- glue::glue(td_template, cls = "col-md-2", thing = syl$timings)
   td2 <- glue::glue(td_template, cls = "col-md-3",
-    thing = c(links, these$translations$computed$Finish))
+    thing = c(links, tr_computed("Finish")))
   td3 <- glue::glue(td_template, cls = "col-md-7", thing = syl$questions)
   out <- glue::glue_collapse(glue::glue("<tr>{td1}{td2}{td3}</tr>"), sep = "\n")
   tmp <- tempfile(fileext = ".md")
diff --git a/R/build_images.R b/R/build_images.R
index 88bb337b..710194de 100644
--- a/R/build_images.R
+++ b/R/build_images.R
@@ -3,7 +3,7 @@ build_images <- function(pkg, pages = NULL, quiet = FALSE) {
   build_agg_page(
     pkg = pkg,
     pages = pages,
-    title = these$translations$computed$AllImages,
+    title = tr_computed("AllImages"),
     slug = "images",
     aggregate = "/img/..",
     prefix = FALSE,
@@ -47,7 +47,7 @@ make_images_section <- function(name, contents, parent) {
     alt <- xml2::xml_text(xml2::xml_find_all(content, "./img/@alt"))
     n <- length(alt)
     xml2::xml_add_child(section, "h3",
-      glue::glue(these$translations$computed$Figure),
+      glue::glue(tr_computed("Figure")),
       id = glue::glue("{name}-figure-{element}")
     )
     for (i in seq_along(alt)) {
@@ -58,7 +58,7 @@ make_images_section <- function(name, contents, parent) {
       if (txt == "") {
         txt <- "[decorative]"
       }
-      desc <- glue::glue(these$translations$computed$ImageOf)
+      desc <- glue::glue(tr_computed("ImageOf"))
       xml2::xml_add_child(section, "p", "aria-hidden" = "true", desc)
     }
     xml2::xml_add_child(section, contents[[element]])
diff --git a/R/build_instructor_notes.R b/R/build_instructor_notes.R
index 65cfa0d8..c6f84ee2 100644
--- a/R/build_instructor_notes.R
+++ b/R/build_instructor_notes.R
@@ -24,7 +24,7 @@ build_instructor_notes <- function(pkg, pages = NULL, built = NULL, quiet) {
     this_dat <- list(
       this_page = "instructor-notes.html",
       body = use_instructor(html),
-      pagetitle = these$translations$varnish$InstructorNotes
+      pagetitle = tr_varnish("InstructorNotes")
     )
 
     page_globals$instructor$update(this_dat)
@@ -135,7 +135,7 @@ make_instructor_note_linkback <- function(node, name) {
   title <- trimws(xml2::xml_text(node))
   id <- xml2::xml_attr(node, "id")
   newid <- glue::glue("{name}-{id}")
-  tranchor <- these$translations$computed$Anchor
+  tranchor <- tr_computed("Anchor")
   anchor <- glue::glue("<a class='anchor' aria-label='{tranchor}' href='#{newid}'></a>")
   new <- "<h3><a href='{name}.html#{id}'>{title}</a>{anchor}</h3>"
   node <- xml2::read_xml(glue::glue(new))
diff --git a/R/build_keypoints.R b/R/build_keypoints.R
index 284199ee..4b49f551 100644
--- a/R/build_keypoints.R
+++ b/R/build_keypoints.R
@@ -3,7 +3,7 @@ build_keypoints <- function(pkg, pages = NULL, quiet = FALSE) {
   build_agg_page(
     pkg = pkg,
     pages = pages,
-    title = these$translations$varnish$KeyPoints,
+    title = tr_varnish("KeyPoints"),
     slug = "key-points",
     aggregate = "/div[starts-with(@id, 'keypoints')]/div[@class='callout-inner']/div[@class='callout-content']/*",
     prefix = FALSE,
diff --git a/R/build_profiles.R b/R/build_profiles.R
index 2db43fd2..45a32b58 100644
--- a/R/build_profiles.R
+++ b/R/build_profiles.R
@@ -13,7 +13,7 @@ build_profiles <- function(pkg, quiet) {
   this_dat <- list(
     this_page = "profiles.html",
     body = use_instructor(html),
-    pagetitle = these$translations$varnish$LearnerProfiles
+    pagetitle = tr_varnish("LearnerProfiles")
   )
   page_globals$instructor$update(this_dat)
 
diff --git a/R/utils-translate.R b/R/utils-translate.R
index 5a11397b..14748be5 100644
--- a/R/utils-translate.R
+++ b/R/utils-translate.R
@@ -1,5 +1,8 @@
-
 #' Establish and Manage Translation Strings
+#' 
+#' This is documentation for internal functions for translation. If you want a
+#' guide to providing translations, please read `vignette("translations",
+#' package = "sandpaper")`
 #'
 #' @details A page generated from {sandpaper} is made up of user-provided
 #'   content wrapped into templated HTML provided by {varnish}. Since users can
@@ -33,15 +36,27 @@
 #'
 #' @aliases translations
 #' @rdname translations
+#' @seealso [known_languages()] for a list of known language codes.
 #' @keywords internal
 #' @examples
+#' # When sandpaper is loaded, these functions return English
 #' snd <- asNamespace("sandpaper")
-#' snd$these$translations$varnish
-#' snd$these$translations$computed
+#' head(snd$tr_varnish())
+#' head(snd$tr_computed())
+#'
+#' # Setting language to Spanish will translate the computed and varnish
 #' snd$set_language("es")
-#' snd$these$translations$computed
-#' snd$set_language() # defaults to English
-#' snd$these$translations$computed
+#' head(snd$tr_varnish())
+#' head(snd$tr_computed())
+#'
+#' # The source will remain the same
+#' head(snd$tr_src("varnish"))
+#' head(snd$tr_src("computed"))
+#'
+#' # Running set_language with no arguments defaults to English
+#' snd$set_language() 
+#' head(snd$tr_varnish())
+#' head(snd$tr_computed())
 these <- new.env(parent = emptyenv())
 
 #' @rdname translations
@@ -165,6 +180,13 @@ establish_translation_vars <- function() {
     src = list(varnish = varnish, computed = computed),
     varnish = varnish,
     computed = computed
+    # NOTE: If you want to include translations for messages to the user in
+    # their own language, they could be added to this list and then the
+    # message functions (e.g. those in R/utils-cli.R) could use
+    # a key from these$translations$msg
+    # msg = list(
+    #   RemovedFile = tr_("Removed {what}"),
+    # )
   )
 }
 
@@ -195,6 +217,7 @@ add_varnish_translations <- function() {
   these$translations$varnish <- lapply(to_translate$varnish, tr_)
   these$translations$computed <- lapply(to_translate$computed, tr_)
 }
+
 #' Show a list of languages known by {sandpaper}
 #'
 #' @return a character vector of language codes known by {sandpaper}
@@ -212,6 +235,8 @@ add_varnish_translations <- function() {
 #' writeLines(paste("-", langs))
 #' ```
 #'
+#' @seealso `vignette("translations", package = "sandpaper")` for an overview
+#'   of providing translations.
 #' @export
 #' @examples
 #' known_languages()
@@ -229,6 +254,44 @@ is_known_language <- function(lang = NULL, warn = FALSE) {
   return(!not_known)
 }
 
+#' @param from a single character specifying the translation list to fetch.
+#'   This defaults to "varnish" but can be one of the following:
+#'   ```{r echo = FALSE, results = "asis"}
+#'   writeLines(paste("-", names(these$translations)))
+#'   ```
+#' @param key a single character specifying a specific key to fetch from the
+#'   translation list. This defaults to `NULL`, returning the whole list.
+#' @return if `key = NULL`, a list if `key` is a single character, the result
+#'   will be an unnamed character vector of length 1 representing the value from
+#'   that list.
+#' @rdname translations
+tr_src <- function(from = "varnish", key = NULL) {
+  res <- these$translations$src[[from]]
+  if (length(key) == 1L) {
+    res <- res[[key]]
+  }
+  return(res)
+}
+
+#' @rdname translations
+tr_get <- function(from = "varnish", key = NULL) {
+  res <- these$translations[[from]]
+  if (length(key) == 1L) {
+    res <- res[[key]]
+  }
+  return(res)
+}
+
+#' @rdname translations
+tr_varnish <- function(key = NULL) {
+  tr_get(from = "varnish", key = key)
+}
+
+#' @rdname translations
+tr_computed <- function(key = NULL) {
+  tr_get(from = "computed", key = key)
+}
+
 
 # Apply translations to text assuming that the names of the translations
 # matches the text
@@ -254,7 +317,7 @@ get_codeblock_translations <- function() {
   needed <- c("OUTPUT",
     "ERROR",
     "WARNING")
-  unlist(these$translations$computed[needed])
+  unlist(tr_computed()[needed])
 }
 
 # generator for translations of callout blocks and accordions
@@ -266,7 +329,7 @@ get_callout_translations <- function() {
     "Discussion",
     "Testimonial",
     "Keypoints")
-  unlist(these$translations$computed[needed])
+  unlist(tr_computed()[needed])
 }
 
 get_accordion_translations <- function() {
@@ -275,7 +338,7 @@ get_accordion_translations <- function() {
     "Show details",
     "Instructor Note"
   )
-  unlist(these$translations$computed[needed])
+  unlist(tr_computed()[needed])
 }
 
 # replace text string with a <(kirby template)> with link text
diff --git a/R/utils-varnish.R b/R/utils-varnish.R
index c1f28d85..e699261d 100644
--- a/R/utils-varnish.R
+++ b/R/utils-varnish.R
@@ -86,7 +86,7 @@ set_globals <- function(path) {
   idx_text <- xml2::xml_contents(idx_link)
   no_index_title <- length(idx_text) == 1 && xml2::xml_text(idx_text) == "0. "
   if (no_index_title) {
-    xml2::xml_set_text(idx_link, these$translations$computed$SummaryAndSchedule)
+    xml2::xml_set_text(idx_link, tr_computed("SummaryAndSchedule"))
   } else {
     xml2::xml_set_text(idx_text, sub("^0[.] ", "", xml2::xml_text(idx_text)))
   }
@@ -94,7 +94,7 @@ set_globals <- function(path) {
   learner_sidebar <- instructor_sidebar
   instructor_sidebar[[1]] <- sindex
   if (no_index_title) {
-    xml2::xml_set_text(idx_link, these$translations$computed$SummaryAndSetup)
+    xml2::xml_set_text(idx_link, tr_computed("SummaryAndSetup"))
     sindex <- create_sidebar_item(nodes = NULL, as.character(idx_link), 1)
   }
   learner_sidebar[[1]] <- sindex
@@ -115,7 +115,7 @@ set_globals <- function(path) {
       sidebar = learner_sidebar,
       more = paste(learner$extras, collapse = ""),
       resources = paste(learner$resources, collapse = ""),
-      translate = these$translations$varnish
+      translate = tr_varnish()
     ), pkg_versions)
   )
   instructor_globals$set(key = NULL,
@@ -125,7 +125,7 @@ set_globals <- function(path) {
       sidebar = instructor_sidebar,
       more = paste(instructor$extras, collapse = ""),
       resources = paste(instructor$resources, collapse = ""),
-      translate = these$translations$varnish
+      translate = tr_varnish()
     ), pkg_versions)
   )
 }
diff --git a/R/utils-xml.R b/R/utils-xml.R
index 22687cb2..3ba9a126 100644
--- a/R/utils-xml.R
+++ b/R/utils-xml.R
@@ -130,7 +130,7 @@ add_class <- function(nodes, new) {
 }
 
 add_anchors <- function(nodes, ids) {
-  tranchor <- these$translations$computed$Anchor
+  tranchor <- tr_computed("Anchor")
   anchor <- paste0(
     "<a class='anchor' aria-label='", tranchor, "' href='#", ids, "'></a>"
   )
@@ -158,7 +158,7 @@ translate_overview <- function(nodes = NULL) {
   opath <- ".//div[starts-with(@class, 'inner')]/h3[@class='card-title'][text()='Objectives']"
   questions <- xml2::xml_find_first(card, qpath)
   objectives <- xml2::xml_find_first(card, opath)
-  translated <- these$translations$computed
+  translated <- tr_computed()
 
   xml2::xml_set_text(questions, translated[["Questions"]])
   xml2::xml_set_text(objectives, translated[["Objectives"]])
diff --git a/man/children/translation-vars.Rmd b/man/children/translation-vars.Rmd
index 9d4f518c..837479cb 100644
--- a/man/children/translation-vars.Rmd
+++ b/man/children/translation-vars.Rmd
@@ -1,20 +1,20 @@
-There are `r length(asNamespace("sandpaper")$these$translations$src$varnish)` translations generated by
+There are `r length(asNamespace("sandpaper")$tr_src("varnish"))` translations generated by
 `set_language()` that correspond to the following variables in {varnish}:
 
 ```{r translation-list, results = "asis", echo = FALSE}
 snd <- asNamespace("sandpaper")
 res <- glue::glue("| `translate.{names(tr)}` | `{sQuote(tr, q = 2)}` |", 
-  tr = snd$these$translations$src$varnish)
+  tr = snd$tr_src("varnish"))
 writeLines(c("| variable | string |\n| --- | --- |", res))
 ```
 
-In addition, there are `r length(asNamespace("sandpaper")$these$translations$src$computed)` translations
+In addition, there are `r length(asNamespace("sandpaper")$tr_src("computed"))` translations
 that are inserted _before_ they get to {varnish}:
 
 ```{r translation-list-computed, results = "asis", echo = FALSE}
 snd <- asNamespace("sandpaper")
 res <- glue::glue("| `{names(tr)}` | `{sQuote(tr, q = 2)}` |", 
-  tr = snd$these$translations$src$computed)
+  tr = snd$tr_src("computed"))
 writeLines(c("| variable | string |\n| --- | --- |", res))
 ```
 
diff --git a/man/known_languages.Rd b/man/known_languages.Rd
index 5cbc1feb..add14421 100644
--- a/man/known_languages.Rd
+++ b/man/known_languages.Rd
@@ -29,3 +29,7 @@ details of how to do so in the source code for {sandpaper}.
 \examples{
 known_languages()
 }
+\seealso{
+\code{vignette("translations", package = "sandpaper")} for an overview
+of providing translations.
+}
diff --git a/man/translations.Rd b/man/translations.Rd
index 5dcdefca..7c787ac9 100644
--- a/man/translations.Rd
+++ b/man/translations.Rd
@@ -6,6 +6,10 @@
 \alias{translations}
 \alias{establish_translation_vars}
 \alias{set_language}
+\alias{tr_src}
+\alias{tr_get}
+\alias{tr_varnish}
+\alias{tr_computed}
 \title{Establish and Manage Translation Strings}
 \format{
 An object of class \code{environment} of length 1.
@@ -16,14 +20,39 @@ these
 establish_translation_vars()
 
 set_language(lang = NULL)
+
+tr_src(from = "varnish", key = NULL)
+
+tr_get(from = "varnish", key = NULL)
+
+tr_varnish(key = NULL)
+
+tr_computed(key = NULL)
 }
 \arguments{
 \item{lang}{a two-letter language code (optionally with a country code).
 Defaults to \code{NULL}, which falls back to English (the language of the
 source code).}
+
+\item{from}{a single character specifying the translation list to fetch.
+This defaults to "varnish" but can be one of the following:
+\itemize{
+\item src
+\item varnish
+\item computed
+}}
+
+\item{key}{a single character specifying a specific key to fetch from the
+translation list. This defaults to \code{NULL}, returning the whole list.}
+}
+\value{
+if \code{key = NULL}, a list if \code{key} is a single character, the result
+will be an unnamed character vector of length 1 representing the value from
+that list.
 }
 \description{
-Establish and Manage Translation Strings
+This is documentation for internal functions for translation. If you want a
+guide to providing translations, please read \code{vignette("translations", package = "sandpaper")}
 }
 \details{
 A page generated from {sandpaper} is made up of user-provided
@@ -155,12 +184,26 @@ that are inserted \emph{before} they get to {varnish}:\tabular{ll}{
 }
 }
 \examples{
+# When sandpaper is loaded, these functions return English
 snd <- asNamespace("sandpaper")
-snd$these$translations$varnish
-snd$these$translations$computed
+head(snd$tr_varnish())
+head(snd$tr_computed())
+
+# Setting language to Spanish will translate the computed and varnish
 snd$set_language("es")
-snd$these$translations$computed
-snd$set_language() # defaults to English
-snd$these$translations$computed
+head(snd$tr_varnish())
+head(snd$tr_computed())
+
+# The source will remain the same
+head(snd$tr_src("varnish"))
+head(snd$tr_src("computed"))
+
+# Running set_language with no arguments defaults to English
+snd$set_language() 
+head(snd$tr_varnish())
+head(snd$tr_computed())
+}
+\seealso{
+\code{\link[=known_languages]{known_languages()}} for a list of known language codes.
 }
 \keyword{internal}
diff --git a/po/R-es.po b/po/R-es.po
index ec58e446..335f8bd2 100644
--- a/po/R-es.po
+++ b/po/R-es.po
@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: sandpaper 0.15.0.9000\n"
-"POT-Creation-Date: 2023-12-18 09:27-0800\n"
+"POT-Creation-Date: 2023-12-19 09:37-0800\n"
 "PO-Revision-Date: 2023-12-06 11:03-0800\n"
 "Last-Translator: Automatically generated\n"
 "Language-Team: none\n"
@@ -11,15 +11,15 @@ msgstr ""
 "Content-Transfer-Encoding: 8bit\n"
 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
 
-#: utils-translate.R:12
+#: utils-translate.R:74
 msgid "Skip to main content"
 msgstr "Ir al contenido principal"
 
-#: utils-translate.R:13
+#: utils-translate.R:75
 msgid "Pre-Alpha"
 msgstr "Pre-Alfa"
 
-#: utils-translate.R:14
+#: utils-translate.R:76
 msgid ""
 "This lesson is in the pre-alpha phase, which means that it is in early "
 "development, but has not yet been taught."
@@ -27,7 +27,7 @@ msgstr ""
 "Esta lección se encuentra en la fase pre-alfa, lo que significa que está en "
 "las primeras etapas de desarrollo, pero aún no se ha enseñado."
 
-#: utils-translate.R:15
+#: utils-translate.R:77
 msgid ""
 "This lesson is in the alpha phase, which means that it has been taught once "
 "and lesson authors are iterating on feedback."
@@ -36,11 +36,11 @@ msgstr ""
 "enseñado una vesy las autoras de la lección están trabajando en los "
 "comentarios."
 
-#: utils-translate.R:16
+#: utils-translate.R:78
 msgid "Alpha"
 msgstr "Alfa"
 
-#: utils-translate.R:17
+#: utils-translate.R:79
 msgid ""
 "This lesson is in the beta phase, which means that it is ready for teaching "
 "by instructors outside of the original author team."
@@ -48,147 +48,147 @@ msgstr ""
 "Esta lección se encuentra en la fase beta, lo que significa que está lista "
 "para enseñarpor instructoras que no son parte del equipo original de autoras"
 
-#: utils-translate.R:18
+#: utils-translate.R:80
 msgid "Beta"
 msgstr "Beta"
 
-#: utils-translate.R:19
+#: utils-translate.R:81
 msgid "This lesson has passed peer review."
 msgstr "Esta lección pasó la revisión por pares."
 
-#: utils-translate.R:20
+#: utils-translate.R:82
 msgid "Instructor View"
 msgstr "Vista de la instructora"
 
-#: utils-translate.R:21
+#: utils-translate.R:83
 msgid "Learner View"
 msgstr "Vista de estudiante"
 
-#: utils-translate.R:22
+#: utils-translate.R:84
 msgid "Main Navigation"
 msgstr "Navegación principal"
 
-#: utils-translate.R:23
+#: utils-translate.R:85
 msgid "Toggle Navigation"
 msgstr "Alternar navegación"
 
-#: utils-translate.R:24
+#: utils-translate.R:86
 msgid "Menu"
 msgstr "Menú"
 
-#: utils-translate.R:25
+#: utils-translate.R:87
 msgid "search button"
 msgstr "botón de buscar"
 
-#: utils-translate.R:26
+#: utils-translate.R:88
 msgid "Setup"
 msgstr "Configuración"
 
-#: utils-translate.R:27
+#: utils-translate.R:89
 msgid "Key Points"
 msgstr "Puntos Clave"
 
-#: utils-translate.R:28
+#: utils-translate.R:90
 msgid "Instructor Notes"
 msgstr "Notas de la instructora"
 
-#: utils-translate.R:29
+#: utils-translate.R:91
 msgid "Glossary"
 msgstr "Glosario"
 
-#: utils-translate.R:30
+#: utils-translate.R:92
 msgid "Learner Profiles"
 msgstr "Perfiles de estudiante"
 
-#: utils-translate.R:31
+#: utils-translate.R:93
 msgid "More"
 msgstr "Más"
 
-#: utils-translate.R:32
+#: utils-translate.R:94
 msgid "Search"
 msgstr "Buscar"
 
-#: utils-translate.R:33
+#: utils-translate.R:95
 msgid "Lesson Progress"
 msgstr "Progreso de la lección"
 
-#: utils-translate.R:35
+#: utils-translate.R:97
 msgid "close menu"
 msgstr "Cerrar menú"
 
-#: utils-translate.R:36
+#: utils-translate.R:98
 msgid "EPISODES"
 msgstr "EPISODIOS"
 
-#: utils-translate.R:37
+#: utils-translate.R:99
 msgid "Home"
 msgstr "Inicio"
 
-#: utils-translate.R:38
+#: utils-translate.R:100
 msgid "Home Page Navigation"
 msgstr "Navegación de la página de inicio"
 
-#: utils-translate.R:39
+#: utils-translate.R:101
 msgid "RESOURCES"
 msgstr "RECURSOS"
 
-#: utils-translate.R:40
+#: utils-translate.R:102
 msgid "Extract All Images"
 msgstr "Extraer todas las imágenes"
 
-#: utils-translate.R:41
+#: utils-translate.R:103
 msgid "See all in one page"
 msgstr "Todo en una sola página"
 
-#: utils-translate.R:42
+#: utils-translate.R:104
 msgid "Download Lesson Handout"
 msgstr "Descargar el material de la lección"
 
-#: utils-translate.R:43
+#: utils-translate.R:105
 msgid "Export Chapter Slides"
 msgstr "Exportar las diapositivas del capítulo"
 
-#: utils-translate.R:45
+#: utils-translate.R:107
 msgid "Previous and Next Chapter"
 msgstr "Capítulo previo y siguiente"
 
-#: utils-translate.R:46
+#: utils-translate.R:108
 msgid "Previous"
 msgstr "Previo"
 
-#: utils-translate.R:47
+#: utils-translate.R:109
 msgid "Estimated time: {icons$clock} {minutes} minutes"
 msgstr "Tiempo estimado: {icons$clock} {minutes} minutos"
 
-#: utils-translate.R:48
+#: utils-translate.R:110
 msgid "Next"
 msgstr "Siguiente"
 
-#: utils-translate.R:49
+#: utils-translate.R:111
 msgid "Next Chapter"
 msgstr "Capítulo Siguiente"
 
-#: utils-translate.R:50
+#: utils-translate.R:112
 msgid "Last updated on {updated}"
 msgstr "Última actualización: {updated}"
 
-#: utils-translate.R:51
+#: utils-translate.R:113
 msgid "Edit this page"
 msgstr "Mejora esta página"
 
-#: utils-translate.R:52 utils-translate.R:73
+#: utils-translate.R:114 utils-translate.R:135
 msgid "Expand All Solutions"
 msgstr "Mostrar todas las soluciones"
 
-#: utils-translate.R:54
+#: utils-translate.R:116
 msgid "Setup Instructions"
 msgstr "Configuración"
 
-#: utils-translate.R:55
+#: utils-translate.R:117
 msgid "Download files required for the lesson"
 msgstr "Descargar los archivos necesarios para la lección"
 
-#: utils-translate.R:56
+#: utils-translate.R:118
 msgid ""
 "The actual schedule may vary slightly depending on the topics and exercises "
 "chosen by the instructor."
@@ -196,178 +196,178 @@ msgstr ""
 "El horario real puede variar ligeramente dependiendo de los temas y "
 "ejercicios elegidos por la instructora."
 
-#: utils-translate.R:58
+#: utils-translate.R:120
 msgid "Back To Top"
 msgstr "Volver al inicio"
 
-#: utils-translate.R:59
+#: utils-translate.R:121
 msgid "<(Back)> To Top"
 msgstr "<(Volver)> al inicio"
 
-#: utils-translate.R:60
+#: utils-translate.R:122
 msgid "This lesson is subject to the <(Code of Conduct)>"
 msgstr "Esta lección está sujeta al <(Código de Conducta)>"
 
-#: utils-translate.R:61
+#: utils-translate.R:123
 msgid "Code of Conduct"
 msgstr "Código de Conducta"
 
-#: utils-translate.R:62
+#: utils-translate.R:124
 msgid "Edit on GitHub"
 msgstr "Editar en GitHub"
 
-#: utils-translate.R:63
+#: utils-translate.R:125
 msgid "Contributing"
 msgstr "Contribuir"
 
-#: utils-translate.R:64
+#: utils-translate.R:126
 msgid "Source"
 msgstr "Fuente"
 
-#: utils-translate.R:65
+#: utils-translate.R:127
 msgid "Cite"
 msgstr "Cita"
 
-#: utils-translate.R:66
+#: utils-translate.R:128
 msgid "Contact"
 msgstr "Contacto"
 
-#: utils-translate.R:67
+#: utils-translate.R:129
 msgid "About"
 msgstr "Acerca de"
 
-#: utils-translate.R:68
+#: utils-translate.R:130
 msgid "Materials licensed under {license} by {authors}"
 msgstr "Materiales bajo la {license} por {authors}"
 
-#: utils-translate.R:69
+#: utils-translate.R:131
 msgid "Template licensed under <(CC-BY 4.0)> by {template_authors}"
 msgstr "Plantilla compartida bajo <(CC-BY 4.0)> por {template_authors}"
 
-#: utils-translate.R:70
+#: utils-translate.R:132
 msgid "The Carpentries"
 msgstr "The Carpentries"
 
-#: utils-translate.R:71
+#: utils-translate.R:133
 msgid "Built with {sandpaper_link}, {pegboard_link}, and {varnish_link}"
 msgstr "Construido con {sandpaper_link}, {pegboard_link} y {varnish_link}"
 
-#: utils-translate.R:74
+#: utils-translate.R:136
 msgid "Collapse All Solutions"
 msgstr "Cerrar todas las soluciones"
 
-#: utils-translate.R:75
+#: utils-translate.R:137
 msgid "Collapse"
 msgstr "Cerrar"
 
-#: utils-translate.R:76
+#: utils-translate.R:138
 msgid "Episodes"
 msgstr "Episodios"
 
-#: utils-translate.R:78
+#: utils-translate.R:140
 msgid "Give Feedback"
 msgstr "Dar feedback"
 
-#: utils-translate.R:79
+#: utils-translate.R:141
 msgid "Learn More"
 msgstr "Aprender más"
 
-#: utils-translate.R:85
+#: utils-translate.R:147
 msgid "OUTPUT"
 msgstr "SALIDA"
 
-#: utils-translate.R:86
+#: utils-translate.R:148
 msgid "WARNING"
 msgstr "ADVERTENCIA"
 
-#: utils-translate.R:87
+#: utils-translate.R:149
 msgid "ERROR"
 msgstr "ERROR"
 
-#: utils-translate.R:89
+#: utils-translate.R:151
 msgid "Overview"
 msgstr "Hoja de ruta"
 
-#: utils-translate.R:90
+#: utils-translate.R:152
 msgid "Questions"
 msgstr "Preguntas"
 
-#: utils-translate.R:91
+#: utils-translate.R:153
 msgid "Objectives"
 msgstr "Objetivos"
 
-#: utils-translate.R:92
+#: utils-translate.R:154
 msgid "Callout"
 msgstr "Aviso"
 
-#: utils-translate.R:93
+#: utils-translate.R:155
 msgid "Challenge"
 msgstr "Desafío"
 
-#: utils-translate.R:94
+#: utils-translate.R:156
 msgid "Prerequisite"
 msgstr "Pre requisito"
 
-#: utils-translate.R:95
+#: utils-translate.R:157
 msgid "Checklist"
 msgstr "Lista de verificación"
 
-#: utils-translate.R:96
+#: utils-translate.R:158
 msgid "Discussion"
 msgstr "Discusión"
 
-#: utils-translate.R:97
+#: utils-translate.R:159
 msgid "Testimonial"
 msgstr "Testimonio"
 
-#: utils-translate.R:100
+#: utils-translate.R:162
 msgid "Show me the solution"
 msgstr "Mostrar la solución"
 
-#: utils-translate.R:101
+#: utils-translate.R:163
 msgid "Give me a hint"
 msgstr "Dar una pista"
 
-#: utils-translate.R:102
+#: utils-translate.R:164
 msgid "Show details"
 msgstr "Mostrar detalles"
 
-#: utils-translate.R:103
+#: utils-translate.R:165
 msgid "Instructor Note"
 msgstr "Notas de la instructora"
 
-#: utils-translate.R:105
+#: utils-translate.R:167
 msgid "Summary and Setup"
 msgstr "Resumen y configuración"
 
-#: utils-translate.R:106
+#: utils-translate.R:168
 msgid "Summary and Schedule"
 msgstr "Resumen y agenda"
 
-#: utils-translate.R:107
+#: utils-translate.R:169
 msgid "All in One View"
 msgstr "Todo en una sola página"
 
-#: utils-translate.R:108
+#: utils-translate.R:170
 msgid "Page not found"
 msgstr "Página no encontrada"
 
-#: utils-translate.R:109
+#: utils-translate.R:171
 msgid "All Images"
 msgstr "Todas las imágenes"
 
-#: utils-translate.R:111
+#: utils-translate.R:173
 msgid "anchor"
 msgstr "anclaje"
 
-#: utils-translate.R:112
+#: utils-translate.R:174
 msgid "Figure {element}"
 msgstr "Figura {element}"
 
-#: utils-translate.R:113
+#: utils-translate.R:175
 msgid "Image {i} of {n}: {sQuote(txt)}"
 msgstr "Imagen {i} de {n}: {sQuote(txt)}"
 
-#: utils-translate.R:114
+#: utils-translate.R:176
 msgid "Finish"
 msgstr "Final"
diff --git a/po/R-ja.po b/po/R-ja.po
index 2c2efb3d..cb49816c 100644
--- a/po/R-ja.po
+++ b/po/R-ja.po
@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: sandpaper 0.14.1.9000\n"
-"POT-Creation-Date: 2023-12-18 09:27-0800\n"
+"POT-Creation-Date: 2023-12-19 09:37-0800\n"
 "PO-Revision-Date: 2023-11-22 09:14+0900\n"
 "Last-Translator: Automatically generated\n"
 "Language-Team: none\n"
@@ -11,15 +11,15 @@ msgstr ""
 "Content-Transfer-Encoding: 8bit\n"
 "Plural-Forms: nplurals=1; plural=0;\n"
 
-#: utils-translate.R:12
+#: utils-translate.R:74
 msgid "Skip to main content"
 msgstr "本文へ移動"
 
-#: utils-translate.R:13
+#: utils-translate.R:75
 msgid "Pre-Alpha"
 msgstr "プレアルファ"
 
-#: utils-translate.R:14
+#: utils-translate.R:76
 msgid ""
 "This lesson is in the pre-alpha phase, which means that it is in early "
 "development, but has not yet been taught."
@@ -27,7 +27,7 @@ msgstr ""
 "このレッスンはプレアルファフェーズ（開発が始まったが、まだ教えられたことがな"
 "い）にある。"
 
-#: utils-translate.R:15
+#: utils-translate.R:77
 msgid ""
 "This lesson is in the alpha phase, which means that it has been taught once "
 "and lesson authors are iterating on feedback."
@@ -35,11 +35,11 @@ msgstr ""
 "このレッスンはアルファフェーズ（一度教えられ、レッスン作成者がフィードバック"
 "を反復している）にある。"
 
-#: utils-translate.R:16
+#: utils-translate.R:78
 msgid "Alpha"
 msgstr "アルファ"
 
-#: utils-translate.R:17
+#: utils-translate.R:79
 msgid ""
 "This lesson is in the beta phase, which means that it is ready for teaching "
 "by instructors outside of the original author team."
@@ -47,147 +47,147 @@ msgstr ""
 "このレッスンはベタフェーズ（原著者チーム以外の指導者にも教える準備が整ってい"
 "る）にある"
 
-#: utils-translate.R:18
+#: utils-translate.R:80
 msgid "Beta"
 msgstr "ベタ"
 
-#: utils-translate.R:19
+#: utils-translate.R:81
 msgid "This lesson has passed peer review."
 msgstr "このレッスンはピアレビューに合格しました"
 
-#: utils-translate.R:20
+#: utils-translate.R:82
 msgid "Instructor View"
 msgstr "インストラクター表示"
 
-#: utils-translate.R:21
+#: utils-translate.R:83
 msgid "Learner View"
 msgstr "学習者表示"
 
-#: utils-translate.R:22
+#: utils-translate.R:84
 msgid "Main Navigation"
 msgstr "メインナビゲーション"
 
-#: utils-translate.R:23
+#: utils-translate.R:85
 msgid "Toggle Navigation"
 msgstr "ナビゲーションの切り替え"
 
-#: utils-translate.R:24
+#: utils-translate.R:86
 msgid "Menu"
 msgstr "メニュー"
 
-#: utils-translate.R:25
+#: utils-translate.R:87
 msgid "search button"
 msgstr "検索ボタン"
 
-#: utils-translate.R:26
+#: utils-translate.R:88
 msgid "Setup"
 msgstr "セットアップ"
 
-#: utils-translate.R:27
+#: utils-translate.R:89
 msgid "Key Points"
 msgstr "まとめ"
 
-#: utils-translate.R:28
+#: utils-translate.R:90
 msgid "Instructor Notes"
 msgstr "インストラクター用メモ"
 
-#: utils-translate.R:29
+#: utils-translate.R:91
 msgid "Glossary"
 msgstr "用語集"
 
-#: utils-translate.R:30
+#: utils-translate.R:92
 msgid "Learner Profiles"
 msgstr "学習者プロフィール"
 
-#: utils-translate.R:31
+#: utils-translate.R:93
 msgid "More"
 msgstr "その他"
 
-#: utils-translate.R:32
+#: utils-translate.R:94
 msgid "Search"
 msgstr "検索"
 
-#: utils-translate.R:33
+#: utils-translate.R:95
 msgid "Lesson Progress"
 msgstr "レッスンの進捗状況"
 
-#: utils-translate.R:35
+#: utils-translate.R:97
 msgid "close menu"
 msgstr "メニューを閉じる"
 
-#: utils-translate.R:36
+#: utils-translate.R:98
 msgid "EPISODES"
 msgstr "エピソード"
 
-#: utils-translate.R:37
+#: utils-translate.R:99
 msgid "Home"
 msgstr "ホーム"
 
-#: utils-translate.R:38
+#: utils-translate.R:100
 msgid "Home Page Navigation"
 msgstr "ホームページのナビゲーション"
 
-#: utils-translate.R:39
+#: utils-translate.R:101
 msgid "RESOURCES"
 msgstr "資料"
 
-#: utils-translate.R:40
+#: utils-translate.R:102
 msgid "Extract All Images"
 msgstr "全ての画像"
 
-#: utils-translate.R:41
+#: utils-translate.R:103
 msgid "See all in one page"
 msgstr "一つにまとまったページ"
 
-#: utils-translate.R:42
+#: utils-translate.R:104
 msgid "Download Lesson Handout"
 msgstr "レッスンのプリントをダウンロード"
 
-#: utils-translate.R:43
+#: utils-translate.R:105
 msgid "Export Chapter Slides"
 msgstr "スライドのエキスポート"
 
-#: utils-translate.R:45
+#: utils-translate.R:107
 msgid "Previous and Next Chapter"
 msgstr "前の章と次の章"
 
-#: utils-translate.R:46
+#: utils-translate.R:108
 msgid "Previous"
 msgstr "前へ"
 
-#: utils-translate.R:47
+#: utils-translate.R:109
 msgid "Estimated time: {icons$clock} {minutes} minutes"
 msgstr "所要時間：{icons$clock} {minutes}分"
 
-#: utils-translate.R:48
+#: utils-translate.R:110
 msgid "Next"
 msgstr "次へ"
 
-#: utils-translate.R:49
+#: utils-translate.R:111
 msgid "Next Chapter"
 msgstr "次のチャプター"
 
-#: utils-translate.R:50
+#: utils-translate.R:112
 msgid "Last updated on {updated}"
 msgstr "最終更新日：{updated}"
 
-#: utils-translate.R:51
+#: utils-translate.R:113
 msgid "Edit this page"
 msgstr "ページの編集"
 
-#: utils-translate.R:52 utils-translate.R:73
+#: utils-translate.R:114 utils-translate.R:135
 msgid "Expand All Solutions"
 msgstr "回答を全て表示する"
 
-#: utils-translate.R:54
+#: utils-translate.R:116
 msgid "Setup Instructions"
 msgstr "セットアップの手順"
 
-#: utils-translate.R:55
+#: utils-translate.R:117
 msgid "Download files required for the lesson"
 msgstr "レッスンに必要なファイルのダウンロード"
 
-#: utils-translate.R:56
+#: utils-translate.R:118
 msgid ""
 "The actual schedule may vary slightly depending on the topics and exercises "
 "chosen by the instructor."
@@ -195,182 +195,182 @@ msgstr ""
 "実際のスケジュールは、講師が選んだトピックやエクササイズによって多少異なる場"
 "合があります。"
 
-#: utils-translate.R:58
+#: utils-translate.R:120
 msgid "Back To Top"
 msgstr "上へ戻る"
 
-#: utils-translate.R:59
+#: utils-translate.R:121
 msgid "<(Back)> To Top"
 msgstr "上へ<(戻る)>"
 
-#: utils-translate.R:60
+#: utils-translate.R:122
 msgid "This lesson is subject to the <(Code of Conduct)>"
 msgstr "このレッスンは<(行動規範)>の対象となっている"
 
-#: utils-translate.R:61
+#: utils-translate.R:123
 msgid "Code of Conduct"
 msgstr "行動規範"
 
-#: utils-translate.R:62
+#: utils-translate.R:124
 msgid "Edit on GitHub"
 msgstr "GitHubで編集"
 
-#: utils-translate.R:63
+#: utils-translate.R:125
 msgid "Contributing"
 msgstr "貢献"
 
-#: utils-translate.R:64
+#: utils-translate.R:126
 msgid "Source"
 msgstr "ソース"
 
-#: utils-translate.R:65
+#: utils-translate.R:127
 msgid "Cite"
 msgstr "引用"
 
-#: utils-translate.R:66
+#: utils-translate.R:128
 msgid "Contact"
 msgstr "お問い合わせ"
 
-#: utils-translate.R:67
+#: utils-translate.R:129
 msgid "About"
 msgstr "概要"
 
-#: utils-translate.R:68
+#: utils-translate.R:130
 msgid "Materials licensed under {license} by {authors}"
 msgstr "材料は{authors}によって{license}のもとに掲載を許諾されている"
 
-#: utils-translate.R:69
+#: utils-translate.R:131
 msgid "Template licensed under <(CC-BY 4.0)> by {template_authors}"
 msgstr ""
 "テンプレートは{template_authors}によって<(CC-BY 4.0)>のもとに掲載を許諾されて"
 "いる"
 
-#: utils-translate.R:70
+#: utils-translate.R:132
 msgid "The Carpentries"
 msgstr "ザ・カーペントリーズ"
 
-#: utils-translate.R:71
+#: utils-translate.R:133
 msgid "Built with {sandpaper_link}, {pegboard_link}, and {varnish_link}"
 msgstr ""
 "このレッスンは{sandpaper_link}、{pegboard_link}、および{varnish_link}によって"
 "作られた"
 
-#: utils-translate.R:74
+#: utils-translate.R:136
 msgid "Collapse All Solutions"
 msgstr "回答を全て折りたたむ"
 
-#: utils-translate.R:75
+#: utils-translate.R:137
 msgid "Collapse"
 msgstr "折りたたむ"
 
-#: utils-translate.R:76
+#: utils-translate.R:138
 msgid "Episodes"
 msgstr "エピソード"
 
-#: utils-translate.R:78
+#: utils-translate.R:140
 msgid "Give Feedback"
 msgstr "フィードバック"
 
-#: utils-translate.R:79
+#: utils-translate.R:141
 msgid "Learn More"
 msgstr "さらに詳しく"
 
-#: utils-translate.R:85
+#: utils-translate.R:147
 msgid "OUTPUT"
 msgstr "出力"
 
-#: utils-translate.R:86
+#: utils-translate.R:148
 msgid "WARNING"
 msgstr "警告"
 
-#: utils-translate.R:87
+#: utils-translate.R:149
 msgid "ERROR"
 msgstr "エラー"
 
-#: utils-translate.R:89
+#: utils-translate.R:151
 msgid "Overview"
 msgstr "概要"
 
-#: utils-translate.R:90
+#: utils-translate.R:152
 msgid "Questions"
 msgstr "質問"
 
-#: utils-translate.R:91
+#: utils-translate.R:153
 msgid "Objectives"
 msgstr "目的"
 
-#: utils-translate.R:92
+#: utils-translate.R:154
 msgid "Callout"
 msgstr "コールアウト"
 
-#: utils-translate.R:93
+#: utils-translate.R:155
 msgid "Challenge"
 msgstr "チャレンジ"
 
-#: utils-translate.R:94
+#: utils-translate.R:156
 msgid "Prerequisite"
 msgstr "必須条件"
 
-#: utils-translate.R:95
+#: utils-translate.R:157
 msgid "Checklist"
 msgstr "チェックリスト"
 
-#: utils-translate.R:96
+#: utils-translate.R:158
 msgid "Discussion"
 msgstr "ディスカッション"
 
-#: utils-translate.R:97
+#: utils-translate.R:159
 msgid "Testimonial"
 msgstr "推薦文"
 
-#: utils-translate.R:100
+#: utils-translate.R:162
 msgid "Show me the solution"
 msgstr "回答を表示する"
 
-#: utils-translate.R:101
+#: utils-translate.R:163
 msgid "Give me a hint"
 msgstr "ヒントを表示する"
 
-#: utils-translate.R:102
+#: utils-translate.R:164
 msgid "Show details"
 msgstr "詳細を表示する"
 
-#: utils-translate.R:103
+#: utils-translate.R:165
 msgid "Instructor Note"
 msgstr "インストラクター用メモ"
 
-#: utils-translate.R:105
+#: utils-translate.R:167
 msgid "Summary and Setup"
 msgstr "概要とセットアップ"
 
-#: utils-translate.R:106
+#: utils-translate.R:168
 msgid "Summary and Schedule"
 msgstr "概要とスケジュール"
 
-#: utils-translate.R:107
+#: utils-translate.R:169
 msgid "All in One View"
 msgstr "一つにまとまったページ"
 
-#: utils-translate.R:108
+#: utils-translate.R:170
 msgid "Page not found"
 msgstr "ページが見つかりません"
 
-#: utils-translate.R:109
+#: utils-translate.R:171
 msgid "All Images"
 msgstr "全ての画像"
 
-#: utils-translate.R:111
+#: utils-translate.R:173
 msgid "anchor"
 msgstr "アンカー"
 
-#: utils-translate.R:112
+#: utils-translate.R:174
 msgid "Figure {element}"
 msgstr "図の{element}"
 
-#: utils-translate.R:113
+#: utils-translate.R:175
 msgid "Image {i} of {n}: {sQuote(txt)}"
 msgstr "画像{i}/{n}: {sQuote(txt)}"
 
-#: utils-translate.R:114
+#: utils-translate.R:176
 msgid "Finish"
 msgstr "終わり"
diff --git a/po/R-sandpaper.pot b/po/R-sandpaper.pot
index 290da473..8f2a2d77 100644
--- a/po/R-sandpaper.pot
+++ b/po/R-sandpaper.pot
@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
-"Project-Id-Version: sandpaper 0.16.1\n"
-"POT-Creation-Date: 2023-12-18 09:27-0800\n"
+"Project-Id-Version: sandpaper 0.16.1.9000\n"
+"POT-Creation-Date: 2023-12-19 09:37-0800\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -10,354 +10,354 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 
-#: utils-translate.R:12
+#: utils-translate.R:74
 msgid "Skip to main content"
 msgstr ""
 
-#: utils-translate.R:13
+#: utils-translate.R:75
 msgid "Pre-Alpha"
 msgstr ""
 
-#: utils-translate.R:14
+#: utils-translate.R:76
 msgid ""
 "This lesson is in the pre-alpha phase, which means that it is in early "
 "development, but has not yet been taught."
 msgstr ""
 
-#: utils-translate.R:15
+#: utils-translate.R:77
 msgid ""
 "This lesson is in the alpha phase, which means that it has been taught once "
 "and lesson authors are iterating on feedback."
 msgstr ""
 
-#: utils-translate.R:16
+#: utils-translate.R:78
 msgid "Alpha"
 msgstr ""
 
-#: utils-translate.R:17
+#: utils-translate.R:79
 msgid ""
 "This lesson is in the beta phase, which means that it is ready for teaching "
 "by instructors outside of the original author team."
 msgstr ""
 
-#: utils-translate.R:18
+#: utils-translate.R:80
 msgid "Beta"
 msgstr ""
 
-#: utils-translate.R:19
+#: utils-translate.R:81
 msgid "This lesson has passed peer review."
 msgstr ""
 
-#: utils-translate.R:20
+#: utils-translate.R:82
 msgid "Instructor View"
 msgstr ""
 
-#: utils-translate.R:21
+#: utils-translate.R:83
 msgid "Learner View"
 msgstr ""
 
-#: utils-translate.R:22
+#: utils-translate.R:84
 msgid "Main Navigation"
 msgstr ""
 
-#: utils-translate.R:23
+#: utils-translate.R:85
 msgid "Toggle Navigation"
 msgstr ""
 
-#: utils-translate.R:24
+#: utils-translate.R:86
 msgid "Menu"
 msgstr ""
 
-#: utils-translate.R:25
+#: utils-translate.R:87
 msgid "search button"
 msgstr ""
 
-#: utils-translate.R:26
+#: utils-translate.R:88
 msgid "Setup"
 msgstr ""
 
-#: utils-translate.R:27
+#: utils-translate.R:89
 msgid "Key Points"
 msgstr ""
 
-#: utils-translate.R:28
+#: utils-translate.R:90
 msgid "Instructor Notes"
 msgstr ""
 
-#: utils-translate.R:29
+#: utils-translate.R:91
 msgid "Glossary"
 msgstr ""
 
-#: utils-translate.R:30
+#: utils-translate.R:92
 msgid "Learner Profiles"
 msgstr ""
 
-#: utils-translate.R:31
+#: utils-translate.R:93
 msgid "More"
 msgstr ""
 
-#: utils-translate.R:32
+#: utils-translate.R:94
 msgid "Search"
 msgstr ""
 
-#: utils-translate.R:33
+#: utils-translate.R:95
 msgid "Lesson Progress"
 msgstr ""
 
-#: utils-translate.R:35
+#: utils-translate.R:97
 msgid "close menu"
 msgstr ""
 
-#: utils-translate.R:36
+#: utils-translate.R:98
 msgid "EPISODES"
 msgstr ""
 
-#: utils-translate.R:37
+#: utils-translate.R:99
 msgid "Home"
 msgstr ""
 
-#: utils-translate.R:38
+#: utils-translate.R:100
 msgid "Home Page Navigation"
 msgstr ""
 
-#: utils-translate.R:39
+#: utils-translate.R:101
 msgid "RESOURCES"
 msgstr ""
 
-#: utils-translate.R:40
+#: utils-translate.R:102
 msgid "Extract All Images"
 msgstr ""
 
-#: utils-translate.R:41
+#: utils-translate.R:103
 msgid "See all in one page"
 msgstr ""
 
-#: utils-translate.R:42
+#: utils-translate.R:104
 msgid "Download Lesson Handout"
 msgstr ""
 
-#: utils-translate.R:43
+#: utils-translate.R:105
 msgid "Export Chapter Slides"
 msgstr ""
 
-#: utils-translate.R:45
+#: utils-translate.R:107
 msgid "Previous and Next Chapter"
 msgstr ""
 
-#: utils-translate.R:46
+#: utils-translate.R:108
 msgid "Previous"
 msgstr ""
 
-#: utils-translate.R:47
+#: utils-translate.R:109
 msgid "Estimated time: {icons$clock} {minutes} minutes"
 msgstr ""
 
-#: utils-translate.R:48
+#: utils-translate.R:110
 msgid "Next"
 msgstr ""
 
-#: utils-translate.R:49
+#: utils-translate.R:111
 msgid "Next Chapter"
 msgstr ""
 
-#: utils-translate.R:50
+#: utils-translate.R:112
 msgid "Last updated on {updated}"
 msgstr ""
 
-#: utils-translate.R:51
+#: utils-translate.R:113
 msgid "Edit this page"
 msgstr ""
 
-#: utils-translate.R:52 utils-translate.R:73
+#: utils-translate.R:114 utils-translate.R:135
 msgid "Expand All Solutions"
 msgstr ""
 
-#: utils-translate.R:54
+#: utils-translate.R:116
 msgid "Setup Instructions"
 msgstr ""
 
-#: utils-translate.R:55
+#: utils-translate.R:117
 msgid "Download files required for the lesson"
 msgstr ""
 
-#: utils-translate.R:56
+#: utils-translate.R:118
 msgid ""
 "The actual schedule may vary slightly depending on the topics and exercises "
 "chosen by the instructor."
 msgstr ""
 
-#: utils-translate.R:58
+#: utils-translate.R:120
 msgid "Back To Top"
 msgstr ""
 
-#: utils-translate.R:59
+#: utils-translate.R:121
 msgid "<(Back)> To Top"
 msgstr ""
 
-#: utils-translate.R:60
+#: utils-translate.R:122
 msgid "This lesson is subject to the <(Code of Conduct)>"
 msgstr ""
 
-#: utils-translate.R:61
+#: utils-translate.R:123
 msgid "Code of Conduct"
 msgstr ""
 
-#: utils-translate.R:62
+#: utils-translate.R:124
 msgid "Edit on GitHub"
 msgstr ""
 
-#: utils-translate.R:63
+#: utils-translate.R:125
 msgid "Contributing"
 msgstr ""
 
-#: utils-translate.R:64
+#: utils-translate.R:126
 msgid "Source"
 msgstr ""
 
-#: utils-translate.R:65
+#: utils-translate.R:127
 msgid "Cite"
 msgstr ""
 
-#: utils-translate.R:66
+#: utils-translate.R:128
 msgid "Contact"
 msgstr ""
 
-#: utils-translate.R:67
+#: utils-translate.R:129
 msgid "About"
 msgstr ""
 
-#: utils-translate.R:68
+#: utils-translate.R:130
 msgid "Materials licensed under {license} by {authors}"
 msgstr ""
 
-#: utils-translate.R:69
+#: utils-translate.R:131
 msgid "Template licensed under <(CC-BY 4.0)> by {template_authors}"
 msgstr ""
 
-#: utils-translate.R:70
+#: utils-translate.R:132
 msgid "The Carpentries"
 msgstr ""
 
-#: utils-translate.R:71
+#: utils-translate.R:133
 msgid "Built with {sandpaper_link}, {pegboard_link}, and {varnish_link}"
 msgstr ""
 
-#: utils-translate.R:74
+#: utils-translate.R:136
 msgid "Collapse All Solutions"
 msgstr ""
 
-#: utils-translate.R:75
+#: utils-translate.R:137
 msgid "Collapse"
 msgstr ""
 
-#: utils-translate.R:76
+#: utils-translate.R:138
 msgid "Episodes"
 msgstr ""
 
-#: utils-translate.R:78
+#: utils-translate.R:140
 msgid "Give Feedback"
 msgstr ""
 
-#: utils-translate.R:79
+#: utils-translate.R:141
 msgid "Learn More"
 msgstr ""
 
-#: utils-translate.R:85
+#: utils-translate.R:147
 msgid "OUTPUT"
 msgstr ""
 
-#: utils-translate.R:86
+#: utils-translate.R:148
 msgid "WARNING"
 msgstr ""
 
-#: utils-translate.R:87
+#: utils-translate.R:149
 msgid "ERROR"
 msgstr ""
 
-#: utils-translate.R:89
+#: utils-translate.R:151
 msgid "Overview"
 msgstr ""
 
-#: utils-translate.R:90
+#: utils-translate.R:152
 msgid "Questions"
 msgstr ""
 
-#: utils-translate.R:91
+#: utils-translate.R:153
 msgid "Objectives"
 msgstr ""
 
-#: utils-translate.R:92
+#: utils-translate.R:154
 msgid "Callout"
 msgstr ""
 
-#: utils-translate.R:93
+#: utils-translate.R:155
 msgid "Challenge"
 msgstr ""
 
-#: utils-translate.R:94
+#: utils-translate.R:156
 msgid "Prerequisite"
 msgstr ""
 
-#: utils-translate.R:95
+#: utils-translate.R:157
 msgid "Checklist"
 msgstr ""
 
-#: utils-translate.R:96
+#: utils-translate.R:158
 msgid "Discussion"
 msgstr ""
 
-#: utils-translate.R:97
+#: utils-translate.R:159
 msgid "Testimonial"
 msgstr ""
 
-#: utils-translate.R:100
+#: utils-translate.R:162
 msgid "Show me the solution"
 msgstr ""
 
-#: utils-translate.R:101
+#: utils-translate.R:163
 msgid "Give me a hint"
 msgstr ""
 
-#: utils-translate.R:102
+#: utils-translate.R:164
 msgid "Show details"
 msgstr ""
 
-#: utils-translate.R:103
+#: utils-translate.R:165
 msgid "Instructor Note"
 msgstr ""
 
-#: utils-translate.R:105
+#: utils-translate.R:167
 msgid "Summary and Setup"
 msgstr ""
 
-#: utils-translate.R:106
+#: utils-translate.R:168
 msgid "Summary and Schedule"
 msgstr ""
 
-#: utils-translate.R:107
+#: utils-translate.R:169
 msgid "All in One View"
 msgstr ""
 
-#: utils-translate.R:108
+#: utils-translate.R:170
 msgid "Page not found"
 msgstr ""
 
-#: utils-translate.R:109
+#: utils-translate.R:171
 msgid "All Images"
 msgstr ""
 
-#: utils-translate.R:111
+#: utils-translate.R:173
 msgid "anchor"
 msgstr ""
 
-#: utils-translate.R:112
+#: utils-translate.R:174
 msgid "Figure {element}"
 msgstr ""
 
-#: utils-translate.R:113
+#: utils-translate.R:175
 msgid "Image {i} of {n}: {sQuote(txt)}"
 msgstr ""
 
-#: utils-translate.R:114
+#: utils-translate.R:176
 msgid "Finish"
 msgstr ""
diff --git a/tests/testthat/test-build_html.R b/tests/testthat/test-build_html.R
index 654f9a89..bc2d03cf 100644
--- a/tests/testthat/test-build_html.R
+++ b/tests/testthat/test-build_html.R
@@ -80,9 +80,6 @@ test_that("(#536) SANDPAPER_SITE envvar works as expected", {
   expect_false(fs::file_exists(orig_profiles_learner))
   expect_false(fs::file_exists(orig_profiles_instructor))
 
-  # needed to ensure the global translations are implemented.
-  set_language("en")
-
   # after build, only the files constrolled by the SANDPAPER_SITE envvar should
   # exist, but the ones in the default site should not exist.
   build_profiles(new_pkg, quiet = TRUE)
@@ -106,9 +103,6 @@ test_that("[build_home()] works independently", {
   fs::file_copy(fs::path(res, "index.md"), built_dir)
   fs::file_copy(fs::path(res, "learners", "setup.md"), built_dir)
 
-  # needed to ensure the global translations are implemented.
-  set_language("en")
-
   build_home(pkg, quiet = TRUE,
     next_page = fs::path(res, "episodes", "introduction.Rmd")
   )
@@ -182,9 +176,6 @@ test_that("[build_profiles()] works independently", {
   expect_false(fs::file_exists(fs::path(pkg$dst_path, "profiles.html")))
   expect_false(fs::file_exists(fs::path(pkg$dst_path, "instructor", "profiles.html")))
 
-  # needed to ensure the global translations are implemented.
-  set_language("en")
-
   build_profiles(pkg, quiet = TRUE)
   expect_true(fs::file_exists(fs::path(pkg$dst_path, "profiles.html")))
   expect_true(fs::file_exists(fs::path(pkg$dst_path, "instructor", "profiles.html")))
diff --git a/tests/testthat/test-translate.R b/tests/testthat/test-translate.R
deleted file mode 100644
index 03209fe2..00000000
--- a/tests/testthat/test-translate.R
+++ /dev/null
@@ -1,235 +0,0 @@
-# Generate temporary lesson and set `lang: ja` in config.yaml
-tmp <- res <- restore_fixture()
-config_path <- fs::path(tmp, "config.yaml")
-config <- yaml::read_yaml(config_path)
-config$lang <- "ja"
-yaml::write_yaml(config, config_path)
-sitepath <- fs::path(tmp, "site", "docs")
-
-test_that("set_language() uses english by default", {
-
-  os <- tolower(Sys.info()[["sysname"]])
-  ver <- getRversion()
-  skip_if(os == "windows" && ver < "4.2")
-
-  # Before anything happens, the translations should match the source
-  expect_equal(these$translations$src$computed, these$translations$computed)
-  expect_equal(these$translations$src$varnish, these$translations$varnish)
-
-  # default is english
-  set_language()
-
-  # If the translations are set to english, the source should continue to match
-  expect_equal(these$translations$src$computed, these$translations$computed)
-  expect_equal(these$translations$src$varnish, these$translations$varnish)
-
-  # confirm a specific source element
-  src <- these$translations$src$computed$OUTPUT
-  expect_equal(these$translations$computed$OUTPUT, src)
-
-  # set to japanese and it becomes different
-  set_language("ja")
-  expect_failure({
-    expect_equal(these$translations$src$computed, these$translations$computed)
-  })
-  expect_failure({
-    expect_equal(these$translations$src$varnish, these$translations$varnish)
-  })
-  OUTJA <- these$translations$computed$OUTPUT
-  expect_failure(expect_equal(OUTJA, src))
-
-  # unknown language will not switch the current language
-  suppressMessages(expect_message(set_language("xx"), "languages"))
-  expect_equal(these$translations$computed$OUTPUT, OUTJA)
-
-  # set back to english (default)
-  set_language()
-  expect_equal(these$translations$computed$OUTPUT, src)
-
-})
-
-
-test_that("set_language() can use country codes", {
-
-  os <- tolower(Sys.info()[["sysname"]])
-  ver <- getRversion()
-  skip_if(os == "windows" && ver < "4.2")
-
-  src <- these$translations$src$computed$OUTPUT
-  expect_silent(set_language("es_AR"))
-  OUTAR <- these$translations$computed$OUTPUT
-  expect_false(identical(OUTAR, src))
-
-  # the country codes will fall back to language code if they don't exist
-  expect_silent(set_language("es"))
-  expect_equal(these$translations$computed$OUTPUT, OUTAR)
-
-})
-
-
-test_that("is_known_language returns a warning for an unknown language", {
-
-  os <- tolower(Sys.info()[["sysname"]])
-  ver <- getRversion()
-  skip_if(os == "windows" && ver < "4.2")
-
-  expect_true(is_known_language("ja"))
-  expect_false(is_known_language("xx"))
-  suppressMessages({
-    expect_message({
-      expect_false(is_known_language("xx", warn = TRUE))
-    }, "languages", label = "is_known_language(warn = TRUE)")
-  })
-
-})
-
-
-test_that("Lessons can be translated with lang setting", {
-
-  # NOTE: this requires the expect_set_translated() function defined in
-  # tests/testthat/helper-translate.R
-
-  skip_if_not(rmarkdown::pandoc_available("2.11"))
-
-  os <- tolower(Sys.info()[["sysname"]])
-  ver <- getRversion()
-  skip_if(os == "windows" && ver < "4.2")
-
-  # Build lesson
-  suppressMessages(build_lesson(tmp, preview = FALSE, quiet = TRUE))
-
-
-  # Home Page ------------------------------------------------------
-  # Testing both learner and instructor versions of this page
-  xml <- xml2::read_html(fs::path(sitepath, "index.html"))
-  instruct <- xml2::read_html(fs::path(sitepath, "instructor/index.html"))
-  # language should be set to japanese
-  expect_equal(xml2::xml_attr(xml, "lang"), "ja")
-  to_main <- xml2::xml_find_first(xml, "//a[@href='#main-content']")
-  ito_main <- xml2::xml_find_first(instruct, "//a[@href='#main-content']")
-  expect_set_translated(to_main, "Skip to main content")
-  expect_set_translated(ito_main, "Skip to main content")
-
-  expect_equal(xml2::xml_attr(instruct, "lang"), "ja")
-  expect_title_translated(xml, "Summary and Setup")
-  expect_title_translated(instruct, "Summary and Schedule")
-
-  # Extract first header (Summary and Setup) from index
-  h1_xpath <- "//h1[@class='schedule-heading']"
-  h1_header <- xml2::xml_find_all(xml, h1_xpath)
-  expect_set_translated(h1_header, "Summary and Setup")
-  ih1_header <- xml2::xml_find_all(instruct, h1_xpath)
-  expect_set_translated(ih1_header, "Summary and Schedule")
-
-  # Schedule for instructor view ends with "Finish"
-  final_cell <- xml2::xml_find_first(instruct, "//tr[last()]/td[2]")
-  expect_set_translated(final_cell, "Finish")
-
-  # Navbar has expected text
-  nav_xpath <- "//a[starts-with(@class,'nav-link')]"
-  nav_links <- xml2::xml_find_all(xml, nav_xpath)
-  expect_set_translated(nav_links,
-    c("Key Points", "Glossary", "Learner Profiles")
-  )
-  inav_links <- xml2::xml_find_all(instruct, nav_xpath)
-  expect_set_translated(inav_links,
-    c("Key Points", "Instructor Notes", "Extract All Images")
-  )
-
-  # aria labels should be translated
-  aria_text <- c(
-    "Main Navigation",
-    "Toggle Navigation",
-    "Search",
-    "search button",
-    "Lesson Progress",
-    "close menu",
-    "Next Chapter",
-    "anchor",
-    "Back To Top"
-  )
-  aria_labels <- xml2::xml_find_all(xml, ".//@aria-label")
-  iaria_labels <- xml2::xml_find_all(instruct, ".//@aria-label")
-  expect_set_translated(aria_labels, aria_text)
-  expect_set_translated(iaria_labels, aria_text)
-
-
-  # GENERATED PAGES ------------------------------------------------
-  # These pages should have translated headers and title elements
-  inst_notes_path <- fs::path(sitepath, "instructor/instructor-notes.html")
-  inst_notes <- xml2::read_html(inst_notes_path)
-  expect_equal(xml2::xml_attr(inst_notes, "lang"), "ja")
-  expect_h1_translated(inst_notes, "Instructor Notes")
-  expect_title_translated(inst_notes, "Instructor Notes")
-
-  profiles <- xml2::read_html(fs::path(sitepath, "profiles.html"))
-  expect_equal(xml2::xml_attr(profiles, "lang"), "ja")
-  expect_h1_translated(profiles, "Learner Profiles")
-  expect_title_translated(profiles, "Learner Profiles")
-
-  fof <- xml2::read_html(fs::path(sitepath, "404.html"))
-  expect_equal(xml2::xml_attr(fof, "lang"), "ja")
-  expect_h1_translated(fof, "Page not found")
-  expect_title_translated(fof, "Page not found")
-
-  imgs <- xml2::read_html(fs::path(sitepath, "instructor/images.html"))
-  expect_equal(xml2::xml_attr(imgs, "lang"), "ja")
-  expect_title_translated(imgs, "All Images")
-
-
-  # Episode elements -------------------------------------------------
-  # We use here the Instructor view because it is more fully featured
-  # NOTE: we expect this to be the first episode after the home page
-  xml <- xml2::read_html(fs::path(sitepath, "instructor", "introduction.html"))
-  expect_equal(xml2::xml_attr(xml, "lang"), "ja")
-  to_main <- xml2::xml_find_first(xml, "//a[@href='#main-content']")
-  expect_set_translated(to_main, "Skip to main content")
-  previous <- xml2::xml_find_all(xml, "//a[@class='chapter-link']")
-  expect_set_translated(previous, c("Home", "Previous"))
-
-  # navbar has expected text
-  nav_links <- xml2::xml_find_all(xml, "//a[starts-with(@class,'nav-link')]")
-  expect_set_translated(nav_links,
-    c("Key Points", "Instructor Notes", "Extract All Images")
-  )
-
-  # aria labels should be translated
-  aria_text <- c(
-    "Main Navigation",
-    "Toggle Navigation",
-    "Search",
-    "search button",
-    "Lesson Progress",
-    "close menu",
-    "Previous and Next Chapter",
-    "anchor",
-    "Back To Top"
-  )
-  aria_labels <- xml2::xml_find_all(xml, ".//@aria-label")
-  expect_set_translated(aria_labels, aria_text)
-
-  # overview, objectives, and questions
-  overview_card <- xml2::xml_find_first(xml, ".//div[@class='overview card']")
-  over_heads <- xml2::xml_find_all(overview_card, ".//h2 | .//h3")
-  expect_set_translated(over_heads, c("Overview", "Questions", "Objectives"))
-
-  # Keypoints are always the last block and should be auto-translated
-  xpath_keypoints <- ".//div[@class='callout keypoints']//h3[@class='callout-title']"
-  keypoints <- xml2::xml_find_first(xml, xpath_keypoints)
-  expect_set_translated(keypoints, "Key Points")
-
-  # Instructor note headings should be translated
-  xpath_instructor <- ".//div[@class='accordion-item']/button/h3"
-  instructor_note <- xml2::xml_find_all(xml, xpath_instructor)
-  expect_set_translated(instructor_note, "Instructor Note")
-
-  # solution headings should be translated
-  xpath_solution <- ".//div[@class='accordion-item']/button/h4"
-  solution <- xml2::xml_find_all(xml, xpath_solution)
-  # take the last solution block because that's the one that does not have
-  # a title.
-  solution <- solution[[length(solution)]]
-
-  expect_set_translated(solution, "Show me the solution")
-
-})
diff --git a/tests/testthat/test-utils-translate.R b/tests/testthat/test-utils-translate.R
new file mode 100644
index 00000000..c8d3692e
--- /dev/null
+++ b/tests/testthat/test-utils-translate.R
@@ -0,0 +1,362 @@
+# Generate temporary lesson and set `lang: ja` in config.yaml
+tmp <- res <- restore_fixture()
+config_path <- fs::path(tmp, "config.yaml")
+config <- yaml::read_yaml(config_path)
+config$lang <- "ja"
+yaml::write_yaml(config, config_path)
+sitepath <- fs::path(tmp, "site", "docs")
+
+# A Note on the conventions of this test file
+# -------------------------------------------
+#
+# The majority of the tests in this file are testing on the rendered version
+# of the lesson that is created above. The lesson is built and then all of the
+# tests for specific keys are run after it. You can find where it builds by
+# searching for a series of equals signs: =======
+#
+# The `helper-translate.R` file contains three functions. These functions will
+# actively test the `tr_()` function, which acts on the VALUES and they test
+# that the text in an HTML node matches the translated text AND that it DOES NOT
+# match the English text.
+#
+#  - expect_set_translated() will take in an HTML node and the values to test
+#    against a known language (ja)
+#  - expect_title_translated() does the same, except it will test that the
+#    <title> element is translated, which is useful for generated pages
+#  - expect_h1_tranlsated() does the same, except it tests for the H1 element,
+#    which is useful for generated pages that have h1 headings.
+#
+# When we test translations, it's important to use the KEYS and not the VALUES
+# for the translations, which will come from the `tr_src()` function. The early
+# tests will confirm that the `tr_src()` function contains the source strings
+# and the `tr_varnish()` and `tr_computed()` functions contain the translated
+# strings.
+#
+# good:
+#   expect_set_translated(node,
+#     tr_src("varnish", "LearnerProfiles")
+#   )
+#   expect_set_translated(nodeset,
+#     c(
+#       tr_src("varnish", "KeyPoints"),
+#       tr_src("varnish", "Glossary"),
+#       tr_src("varnish", "LearnerProfiles")
+#     )
+#   )
+# bad:
+#   expect_set_translated(node, "Learner Profiles")
+#   expect_set_translated(nodeset,
+#     c("Key Points", "Glossary", "Learner Profiles")
+#   )
+#
+# The reason for this convention is two-fold:
+#
+# 1. using tr_src(collection, key) allows us to confirm that a given key is
+#    found in a specific collection.
+# 2. we can change the values and confirm that the tests work without changing
+#    the tests.
+#
+# That's it. Happy testing, don't die!
+
+test_that("tr_ helpers will extract the source", {
+
+  expect_equal(these$translations$src$computed, tr_src("computed"))
+  expect_equal(these$translations$src$varnish, tr_src("varnish"))
+
+  # different collections should not be equivalent
+  expect_failure({
+    expect_equal(tr_src("varnish"), tr_src("computed"))
+  })
+})
+
+
+test_that("set_language() uses english by default and test helpers are valid", {
+
+  os <- tolower(Sys.info()[["sysname"]])
+  ver <- getRversion()
+  skip_if(os == "windows" && ver < "4.2")
+
+  # Before anything happens, the translations should match the source
+  expect_equal(tr_computed(), tr_src("computed"))
+  expect_equal(tr_varnish(), tr_src("varnish"))
+
+  # translations should not match their reciprocal
+  expect_failure({
+    expect_equal(tr_computed(), tr_src("varnish"))
+  })
+  expect_failure({
+    expect_equal(tr_varnish(), tr_src("computed"))
+  })
+
+  # default is english
+  set_language()
+
+  # If the translations are set to english, the source should continue to match
+  expect_equal(tr_computed(), tr_src("computed"))
+  expect_equal(tr_varnish(), tr_src("varnish"))
+
+  # confirm a specific source element
+  src <- tr_src("computed", "OUTPUT")
+  expect_equal(src, tr_computed("OUTPUT"))
+
+  # set to japanese and it becomes different
+  set_language("ja")
+  expect_failure({
+    expect_equal(tr_computed(), tr_src("computed"))
+  })
+  expect_failure({
+    expect_equal(tr_varnish(), tr_src("varnish"))
+  })
+  OUTJA <- tr_computed("OUTPUT")
+  expect_failure(expect_equal(OUTJA, src))
+
+  # unknown language will not switch the current language
+  suppressMessages(expect_message(set_language("xx"), "languages"))
+  expect_equal(tr_computed("OUTPUT"), OUTJA)
+
+  # set back to english (default)
+  set_language()
+  expect_equal(tr_computed("OUTPUT"), src)
+
+})
+
+
+test_that("set_language() can use country codes", {
+
+  os <- tolower(Sys.info()[["sysname"]])
+  ver <- getRversion()
+  skip_if(os == "windows" && ver < "4.2")
+
+  src <- tr_src("computed")$OUTPUT
+  expect_silent(set_language("es_AR"))
+  OUTAR <- tr_computed("OUTPUT")
+  expect_false(identical(OUTAR, src))
+
+  # the country codes will fall back to language code if they don't exist
+  expect_silent(set_language("es"))
+  expect_equal(tr_computed("OUTPUT"), OUTAR)
+
+})
+
+
+test_that("is_known_language returns a warning for an unknown language", {
+
+  os <- tolower(Sys.info()[["sysname"]])
+  ver <- getRversion()
+  skip_if(os == "windows" && ver < "4.2")
+
+  expect_true(is_known_language("ja"))
+  expect_false(is_known_language("xx"))
+  suppressMessages({
+    expect_message({
+      expect_false(is_known_language("xx", warn = TRUE))
+    }, "languages", label = "is_known_language(warn = TRUE)")
+  })
+
+})
+
+
+test_that("Lessons can be translated with lang setting", {
+
+  # NOTE: this requires the following functions defined in
+  # tests/testthat/helper-translate.R:
+  #  - expect_set_translated()
+  #  - expect_title_translated()
+  #  - expect_h1_translated()
+
+  skip_if_not(rmarkdown::pandoc_available("2.11"))
+
+  os <- tolower(Sys.info()[["sysname"]])
+  ver <- getRversion()
+  skip_if(os == "windows" && ver < "4.2")
+
+  # Build lesson ===================================================
+  suppressMessages(build_lesson(tmp, preview = FALSE, quiet = TRUE))
+
+
+  # Home Page ------------------------------------------------------
+  # Testing both learner and instructor versions of this page
+  xml <- xml2::read_html(fs::path(sitepath, "index.html"))
+  instruct <- xml2::read_html(fs::path(sitepath, "instructor/index.html"))
+  # language should be set to japanese
+  expect_equal(xml2::xml_attr(xml, "lang"), "ja")
+  to_main <- xml2::xml_find_first(xml, "//a[@href='#main-content']")
+  ito_main <- xml2::xml_find_first(instruct, "//a[@href='#main-content']")
+  expect_set_translated(to_main,
+    tr_src("varnish", "SkipToMain")
+  )
+  expect_set_translated(ito_main,
+    tr_src("varnish", "SkipToMain")
+  )
+
+  expect_equal(xml2::xml_attr(instruct, "lang"), "ja")
+  expect_title_translated(xml,
+    tr_src("computed", "SummaryAndSetup")
+  )
+  expect_title_translated(instruct,
+    tr_src("computed", "SummaryAndSchedule")
+  )
+
+  # Extract first header (Summary and Setup) from index
+  h1_xpath <- "//h1[@class='schedule-heading']"
+  h1_header <- xml2::xml_find_all(xml, h1_xpath)
+  expect_set_translated(h1_header,
+    tr_src("computed", "SummaryAndSetup")
+  )
+  ih1_header <- xml2::xml_find_all(instruct, h1_xpath)
+  expect_set_translated(ih1_header,
+    tr_src("computed", "SummaryAndSchedule")
+  )
+
+  # Schedule for instructor view ends with "Finish"
+  final_cell <- xml2::xml_find_first(instruct, "//tr[last()]/td[2]")
+  expect_set_translated(final_cell,
+    tr_src("computed", "Finish")
+  )
+
+  # Navbar has expected text
+  nav_xpath <- "//a[starts-with(@class,'nav-link')]"
+  nav_links <- xml2::xml_find_all(xml, nav_xpath)
+  expect_set_translated(nav_links,
+    c(tr_src("varnish", "KeyPoints"),
+      tr_src("varnish", "Glossary"),
+      tr_src("varnish", "LearnerProfiles")
+    )
+  )
+  inav_links <- xml2::xml_find_all(instruct, nav_xpath)
+  expect_set_translated(inav_links,
+    c(tr_src("varnish", "KeyPoints"),
+      tr_src("varnish", "InstructorNotes"),
+      tr_src("varnish", "ExtractAllImages")
+    )
+  )
+
+  # aria labels should be translated
+  aria_text <- c(
+    tr_src("varnish", "MainNavigation"),
+    tr_src("varnish", "ToggleNavigation"),
+    tr_src("varnish", "Search"),
+    tr_src("varnish", "SearchButton"),
+    tr_src("varnish", "LessonProgress"),
+    tr_src("varnish", "CloseMenu"),
+    tr_src("varnish", "NextChapter"),
+    tr_src("computed", "Anchor"),
+    tr_src("varnish", "BackToTop")
+  )
+  aria_labels <- xml2::xml_find_all(xml, ".//@aria-label")
+  iaria_labels <- xml2::xml_find_all(instruct, ".//@aria-label")
+  expect_set_translated(aria_labels, aria_text)
+  expect_set_translated(iaria_labels, aria_text)
+
+
+  # GENERATED PAGES ------------------------------------------------
+  # These pages should have translated headers and title elements
+  inst_notes_path <- fs::path(sitepath, "instructor/instructor-notes.html")
+  inst_notes <- xml2::read_html(inst_notes_path)
+  expect_equal(xml2::xml_attr(inst_notes, "lang"), "ja")
+  expect_h1_translated(inst_notes,
+    tr_src("varnish", "InstructorNotes")
+  )
+  expect_title_translated(inst_notes,
+    tr_src("varnish", "InstructorNotes")
+  )
+
+  profiles <- xml2::read_html(fs::path(sitepath, "profiles.html"))
+  expect_equal(xml2::xml_attr(profiles, "lang"), "ja")
+  expect_h1_translated(profiles,
+    tr_src("varnish", "LearnerProfiles")
+  )
+  expect_title_translated(profiles,
+    tr_src("varnish", "LearnerProfiles")
+  )
+
+  fof <- xml2::read_html(fs::path(sitepath, "404.html"))
+  expect_equal(xml2::xml_attr(fof, "lang"), "ja")
+  expect_h1_translated(fof,
+    tr_src("computed", "PageNotFound")
+  )
+  expect_title_translated(fof,
+    tr_src("computed", "PageNotFound")
+  )
+
+  imgs <- xml2::read_html(fs::path(sitepath, "instructor/images.html"))
+  expect_equal(xml2::xml_attr(imgs, "lang"), "ja")
+  expect_title_translated(imgs,
+    tr_src("computed", "AllImages")
+  )
+
+
+  # Episode elements -------------------------------------------------
+  # We use here the Instructor view because it is more fully featured
+  # NOTE: we expect this to be the first episode after the home page
+  xml <- xml2::read_html(fs::path(sitepath, "instructor", "introduction.html"))
+  expect_equal(xml2::xml_attr(xml, "lang"), "ja")
+  to_main <- xml2::xml_find_first(xml, "//a[@href='#main-content']")
+  expect_set_translated(to_main, tr_src("varnish", "SkipToMain"))
+  previous <- xml2::xml_find_all(xml, "//a[@class='chapter-link']")
+  expect_set_translated(previous, c(
+      tr_src("varnish", "Home"),
+      tr_src("varnish", "Previous")
+    )
+  )
+
+  # navbar has expected text
+  nav_links <- xml2::xml_find_all(xml, "//a[starts-with(@class,'nav-link')]")
+  expect_set_translated(nav_links,
+    c(tr_src("varnish", "KeyPoints"),
+      tr_src("varnish", "InstructorNotes"),
+      tr_src("varnish", "ExtractAllImages")
+    )
+  )
+
+  # aria labels should be translated
+  aria_text <- c(
+    tr_src("varnish", "MainNavigation"),
+    tr_src("varnish", "ToggleNavigation"),
+    tr_src("varnish", "Search"),
+    tr_src("varnish", "SearchButton"),
+    tr_src("varnish", "LessonProgress"),
+    tr_src("varnish", "CloseMenu"),
+    tr_src("varnish", "PreviousAndNext"),
+    tr_src("computed", "Anchor"),
+    tr_src("varnish", "BackToTop")
+  )
+  aria_labels <- xml2::xml_find_all(xml, ".//@aria-label")
+  expect_set_translated(aria_labels, aria_text)
+
+  # overview, objectives, and questions
+  overview_card <- xml2::xml_find_first(xml, ".//div[@class='overview card']")
+  over_heads <- xml2::xml_find_all(overview_card, ".//h2 | .//h3")
+  expect_set_translated(over_heads,
+    c(tr_src("computed", "Overview"),
+      tr_src("computed", "Questions"),
+      tr_src("computed", "Objectives")
+    )
+  )
+
+  # Keypoints are always the last block and should be auto-translated
+  xpath_keypoints <- ".//div[@class='callout keypoints']//h3[@class='callout-title']"
+  keypoints <- xml2::xml_find_first(xml, xpath_keypoints)
+  expect_set_translated(keypoints,
+    tr_src("computed", "Keypoints")
+  )
+
+  # Instructor note headings should be translated
+  xpath_instructor <- ".//div[@class='accordion-item']/button/h3"
+  instructor_note <- xml2::xml_find_all(xml, xpath_instructor)
+  expect_set_translated(instructor_note,
+    tr_src("computed", "Instructor Note")
+  )
+
+  # solution headings should be translated
+  xpath_solution <- ".//div[@class='accordion-item']/button/h4"
+  solution <- xml2::xml_find_all(xml, xpath_solution)
+  # take the last solution block because that's the one that does not have
+  # a title.
+  solution <- solution[[length(solution)]]
+
+  expect_set_translated(solution,
+    tr_src("computed", "Show me the solution")
+  )
+
+})
diff --git a/vignettes/translations.Rmd b/vignettes/translations.Rmd
index dbe092c4..308a2378 100644
--- a/vignettes/translations.Rmd
+++ b/vignettes/translations.Rmd
@@ -149,9 +149,11 @@ with_language("xx", {
 })
 ```
 
-To make translation keys easier to detect, a convenience function, `tr_()` has
-been defined, so if you want to find the context for a given translation key,
-you can find it by searching the source code for `tr_`.
+To make translation keys easier to detect, an internal convenience function,
+`tr_()` has been defined, In addition, the source strings and keys for the
+translations can be found from `tr_src()`, `tr_varnish()` and `tr_computed()`,
+so if you want to find the context for a given translation key, you can find it
+by searching the source code for `tr_`.
 
 ### Special syntax for translators