diff --git a/data/scripts/sort_all.py b/data/scripts/sort_all.py
index 20d82fd3c..d1ba06c07 100755
--- a/data/scripts/sort_all.py
+++ b/data/scripts/sort_all.py
@@ -10,8 +10,8 @@
     print(("Usage: ", sys.argv[0], "[directory]"))
     exit(1)
 
-dirtectory = sys.argv[1]
-files = glob.glob(dirtectory + "/*")
+directory = sys.argv[1]
+files = glob.glob(directory + "/*")
 for filename in files:
     print(filename)
     sort_items(filename, filename)
diff --git a/doc/opencc.doxy.in b/doc/opencc.doxy.in
index a93862d7f..1dcf0c7aa 100644
--- a/doc/opencc.doxy.in
+++ b/doc/opencc.doxy.in
@@ -909,7 +909,7 @@ HTML_STYLESHEET        =
 # user-defined cascading style sheet that is included after the standard
 # style sheets created by doxygen. Using this option one can overrule
 # certain style aspects. This is preferred over using HTML_STYLESHEET
-# since it does not replace the standard style sheet and is therefor more
+# since it does not replace the standard style sheet and is therefore more
 # robust against future updates. Doxygen will copy the style sheet file to
 # the output directory.
 
@@ -1707,7 +1707,7 @@ UML_LOOK               = NO
 # the class node. If there are many fields or methods and many nodes the
 # graph may become too big to be useful. The UML_LIMIT_NUM_FIELDS
 # threshold limits the number of items for each type to make the size more
-# managable. Set this to 0 for no limit. Note that the threshold may be
+# manageable. Set this to 0 for no limit. Note that the threshold may be
 # exceeded by 50% before the limit is enforced.
 
 UML_LIMIT_NUM_FIELDS   = 10
diff --git a/src/SimpleConverter.hpp b/src/SimpleConverter.hpp
index 206edea74..56932b76c 100644
--- a/src/SimpleConverter.hpp
+++ b/src/SimpleConverter.hpp
@@ -66,7 +66,7 @@ class OPENCC_EXPORT SimpleConverter {
 
   /**
    * Converts a text and writes to an allocated buffer
-   * Please make sure the buffer has sufficent space.
+   * Please make sure the buffer has sufficient space.
    * @param input  A C-Style std::string (terminated by '\0') to be converted.
    * @param output Buffer to write the converted text.
    * @return       Length of converted text.
@@ -75,7 +75,7 @@ class OPENCC_EXPORT SimpleConverter {
 
   /**
    * Converts a text and writes to an allocated buffer
-   * Please make sure the buffer has sufficent space.
+   * Please make sure the buffer has sufficient space.
    * @param input  A C-Style std::string limited by a given length to be
    * converted.
    * @param length Maximal length in byte of the input std::string.
diff --git a/src/UTF8Util.hpp b/src/UTF8Util.hpp
index a04a6fccf..9d3e39b8d 100644
--- a/src/UTF8Util.hpp
+++ b/src/UTF8Util.hpp
@@ -145,7 +145,7 @@ class OPENCC_EXPORT UTF8Util {
   }
 
   /**
-   * Returns ture if the character is a line ending or end of file.
+   * Returns true if the character is a line ending or end of file.
    */
   static bool IsLineEndingOrFileEnding(const char ch) {
     return ch == '\0' || ch == '\n' || ch == '\r';