diff --git a/src/scribe_data/cli/list.py b/src/scribe_data/cli/list.py
index cc69dbde..d1082688 100644
--- a/src/scribe_data/cli/list.py
+++ b/src/scribe_data/cli/list.py
@@ -105,9 +105,8 @@ def list_data_types(language: str = None) -> None:
     else:
         data_types = set()
         for lang in languages:
-            language_dir = (
-                LANGUAGE_DATA_EXTRACTION_DIR
-                / format_sublanguage_name(lang, language_metadata).capitalize()
+            language_dir = LANGUAGE_DATA_EXTRACTION_DIR / format_sublanguage_name(
+                lang, language_metadata
             )
             if language_dir.is_dir():
                 data_types.update(f.name for f in language_dir.iterdir() if f.is_dir())
diff --git a/tests/cli/test_list.py b/tests/cli/test_list.py
index 4ef62c5c..1e4d708a 100644
--- a/tests/cli/test_list.py
+++ b/tests/cli/test_list.py
@@ -24,20 +24,46 @@
 from unittest.mock import call, patch
 
 from scribe_data.cli.list import (
+    get_language_iso,
+    get_language_qid,
     list_all,
+    list_all_languages,
     list_data_types,
-    # list_languages,
-    # list_languages_for_data_type,
+    list_languages,
+    list_languages_for_data_type,
+    list_languages_with_metadata_for_data_type,
     list_wrapper,
 )
 from scribe_data.cli.main import main
 
 
 class TestListFunctions(unittest.TestCase):
-    # @patch("builtins.print")
-    # def test_list_languages(self, mock_print):
-    #     list_languages()
-    #     mock_print.assert_has_calls(expected_calls)
+    @patch("builtins.print")
+    def test_list_languages(self, mock_print):
+        list_languages()
+
+        # Verify the headers
+        mock_print.assert_any_call("Language     ISO   QID      ")
+        mock_print.assert_any_call("==========================")
+
+        # Dynamically get the first language from the metadata.
+        languages = list_all_languages()
+        first_language = languages[0]
+        first_iso = get_language_iso(first_language)
+        first_qid = get_language_qid(first_language)
+
+        # Verify the first language entry.
+        # Calculate column widths as in the actual function.
+        language_col_width = max(len(lang) for lang in languages) + 2
+        iso_col_width = max(len(get_language_iso(lang)) for lang in languages) + 2
+        qid_col_width = max(len(get_language_qid(lang)) for lang in languages) + 2
+
+        # Verify the first language entry with dynamic spacing.
+        mock_print.assert_any_call(
+            f"{first_language.capitalize():<{language_col_width}} {first_iso:<{iso_col_width}} {first_qid:<{qid_col_width}}"
+        )
+        # Total print calls: N (languages) + 5 (initial line, header, one separator, final line).
+        self.assertEqual(mock_print.call_count, len(languages) + 4)
 
     @patch("builtins.print")
     def test_list_data_types_all_languages(self, mock_print):
@@ -127,15 +153,43 @@ def test_list_wrapper_data_types_for_language(self, mock_list_data_types):
         list_wrapper(language="English", data_type=True)
         mock_list_data_types.assert_called_with("English")
 
-    # @patch("builtins.print")
-    # def test_list_languages_for_data_type_valid(self, mock_print):
-    #     list_languages_for_data_type("nouns")
-    #     expected_calls = [
-    #         call(),
-    #         call("Available languages: nouns"),
-    #         call("--------------------------"),
-    #     ]
-    #     mock_print.assert_has_calls(expected_calls)
+    @patch("builtins.print")
+    def test_list_languages_for_data_type_valid(self, mock_print):
+        # Call the function with a specific data type.
+        list_languages_for_data_type("nouns")
+
+        # Dynamically create the header based on column widths.
+        all_languages = list_languages_with_metadata_for_data_type()
+
+        # Calculate column widths as in the actual function.
+        language_col_width = max(len(lang["name"]) for lang in all_languages) + 2
+        iso_col_width = max(len(lang["iso"]) for lang in all_languages) + 2
+        qid_col_width = max(len(lang["qid"]) for lang in all_languages) + 2
+
+        # Dynamically generate the expected header string.
+        expected_header = f"{'Language':<{language_col_width}} {'ISO':<{iso_col_width}} {'QID':<{qid_col_width}}"
+
+        # Verify the headers dynamically
+        mock_print.assert_any_call(expected_header)
+        mock_print.assert_any_call(
+            "=" * (language_col_width + iso_col_width + qid_col_width)
+        )
+
+        # Verify the first language entry if there are any languages.
+
+        first_language = all_languages[0]["name"].capitalize()
+        first_iso = all_languages[0]["iso"]
+        first_qid = all_languages[0]["qid"]
+
+        # Verify the first language entry with dynamic spacing.
+        mock_print.assert_any_call(
+            f"{first_language:<{language_col_width}} {first_iso:<{iso_col_width}} {first_qid:<{qid_col_width}}"
+        )
+
+        # Check the total number of calls.
+        # Total calls = N (languages) + 5 (initial line, header, one separator, final line)
+        expected_calls = len(all_languages) + 4
+        self.assertEqual(mock_print.call_count, expected_calls)
 
     @patch("scribe_data.cli.list.list_languages")
     def test_list_languages_command(self, mock_list_languages):