diff --git a/src/gen-os2-unicode-ranges.py b/src/gen-os2-unicode-ranges.py
index 21aa1b9..b1a34d4 100755
--- a/src/gen-os2-unicode-ranges.py
+++ b/src/gen-os2-unicode-ranges.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 
 """Generates the code for a sorted unicode range array as used in hb-ot-os2-unicode-ranges.hh
-Input is a tab seperated list of unicode ranges from the otspec
+Input is a tab separated list of unicode ranges from the otspec
 (https://docs.microsoft.com/en-us/typography/opentype/spec/os2#ur).
 """
 
diff --git a/src/hb-aat-layout-just-table.hh b/src/hb-aat-layout-just-table.hh
index d745c11..0bf9bd2 100644
--- a/src/hb-aat-layout-just-table.hh
+++ b/src/hb-aat-layout-just-table.hh
@@ -146,7 +146,7 @@
   HBUINT32	variationAxis;	/* The 4-byte tag identifying the ductile axis.
 				 * This would normally be 0x64756374 ('duct'),
 				 * but you may use any axis the font contains. */
-  HBFixed	minimumLimit;	/* The lowest value for the ductility axis tha
+  HBFixed	minimumLimit;	/* The lowest value for the ductility axis that
 				 * still yields an acceptable appearance. Normally
 				 * this will be 1.0. */
   HBFixed	noStretchValue; /* This is the default value that corresponds to
diff --git a/src/hb-array.hh b/src/hb-array.hh
index 0beffb0..1d1476d 100644
--- a/src/hb-array.hh
+++ b/src/hb-array.hh
@@ -412,7 +412,7 @@
   return true;
 }
 
-/* TODO Specialize opeator== for hb_bytes_t and hb_ubytes_t. */
+/* TODO Specialize operator== for hb_bytes_t and hb_ubytes_t. */
 
 template <>
 inline uint32_t hb_array_t<const char>::hash () const {
diff --git a/src/hb-cff2-interp-cs.hh b/src/hb-cff2-interp-cs.hh
index d961566..8e6dede 100644
--- a/src/hb-cff2-interp-cs.hh
+++ b/src/hb-cff2-interp-cs.hh
@@ -202,7 +202,7 @@
     switch (op) {
       case OpCode_callsubr:
       case OpCode_callgsubr:
-	/* a subroutine number shoudln't be a blended value */
+	/* a subroutine number shouldn't be a blended value */
 	if (unlikely (env.argStack.peek ().blending ()))
 	{
 	  env.set_error ();
diff --git a/src/hb-draw.h b/src/hb-draw.h
index bddc876..f82cc34 100644
--- a/src/hb-draw.h
+++ b/src/hb-draw.h
@@ -50,7 +50,7 @@
  *
  * Glyph draw callbacks.
  *
- * _move_to, _line_to and _cubic_to calls are nessecary to be defined but we
+ * _move_to, _line_to and _cubic_to calls are necessary to be defined but we
  * translate _quadratic_to calls to _cubic_to if the callback isn't defined.
  *
  * Since: EXPERIMENTAL
diff --git a/src/hb-ot-color.cc b/src/hb-ot-color.cc
index b4cbd81..1607776 100644
--- a/src/hb-ot-color.cc
+++ b/src/hb-ot-color.cc
@@ -116,7 +116,7 @@
  * @color_index: The index of the color
  *
  * Fetches the `name` table Name ID that provides display names for
- * the specificed color in a face's `CPAL` color palette.
+ * the specified color in a face's `CPAL` color palette.
  *
  * Display names can be generic (e.g., "Background") or specific
  * (e.g., "Eye color").
diff --git a/src/hb-ot-layout-common.hh b/src/hb-ot-layout-common.hh
index 39d6e0e..930edde 100644
--- a/src/hb-ot-layout-common.hh
+++ b/src/hb-ot-layout-common.hh
@@ -849,7 +849,7 @@
     if (unlikely (!c->check_struct (this))) return_trace (false);
 
     /* This subtable has some "history", if you will.  Some earlier versions of
-     * Adobe tools calculated the offset of the FeatureParams sutable from the
+     * Adobe tools calculated the offset of the FeatureParams subtable from the
      * beginning of the FeatureList table!  Now, that is dealt with in the
      * Feature implementation.  But we still need to be able to tell junk from
      * real data.  Note: We don't check that the nameID actually exists.
diff --git a/src/hb-ot-shape-complex-hangul.cc b/src/hb-ot-shape-complex-hangul.cc
index fe5b014..3bc9e9b 100644
--- a/src/hb-ot-shape-complex-hangul.cc
+++ b/src/hb-ot-shape-complex-hangul.cc
@@ -140,7 +140,7 @@
    *
    *   - LV can be precomposed, or decomposed.  Lets call those
    *     <LV> and <L,V>,
-   *   - LVT can be fully precomposed, partically precomposed, or
+   *   - LVT can be fully precomposed, partially precomposed, or
    *     fully decomposed.  Ie. <LVT>, <LV,T>, or <L,V,T>.
    *
    * The composition / decomposition is mechanical.  However, not
diff --git a/src/hb-ot-shape.cc b/src/hb-ot-shape.cc
index fe6bbba..e16377f 100644
--- a/src/hb-ot-shape.cc
+++ b/src/hb-ot-shape.cc
@@ -1034,7 +1034,7 @@
    * hanging over the next glyph after the final reordering.
    *
    * Note: If fallback positinoing happens, we don't care about
-   * this as it will be overriden.
+   * this as it will be overridden.
    */
   bool adjust_offsets_when_zeroing = c->plan->adjust_mark_positioning_when_zeroing &&
 				     HB_DIRECTION_IS_FORWARD (c->buffer->props.direction);
diff --git a/src/hb-ot-var-gvar-table.hh b/src/hb-ot-var-gvar-table.hh
index 49b5532..204fa5f 100644
--- a/src/hb-ot-var-gvar-table.hh
+++ b/src/hb-ot-var-gvar-table.hh
@@ -399,7 +399,7 @@
 				  get_offset (glyphCount) - get_offset (0)));
   }
 
-  /* GlyphVariationData not sanitized here; must be checked while accessing each glyph varation data */
+  /* GlyphVariationData not sanitized here; must be checked while accessing each glyph variation data */
   bool sanitize (hb_sanitize_context_t *c) const
   { return sanitize_shallow (c); }
 
diff --git a/src/hb-ot-var.h b/src/hb-ot-var.h
index ce201d3..05147cc 100644
--- a/src/hb-ot-var.h
+++ b/src/hb-ot-var.h
@@ -109,7 +109,7 @@
  * @tag: The #hb_tag_t tag identifying the design variation of the axis
  * @name_id: The `name` table Name ID that provides display names for the axis
  * @flags: The #hb_ot_var_axis_flags_t flags for the axis
- * @min_value: The mininum value on the variation axis that the font covers
+ * @min_value: The minimum value on the variation axis that the font covers
  * @default_value: The position on the variation axis corresponding to the font's defaults
  * @max_value: The maximum value on the variation axis that the font covers
  * 
diff --git a/src/hb-repacker.hh b/src/hb-repacker.hh
index 384d084..53233cb 100644
--- a/src/hb-repacker.hh
+++ b/src/hb-repacker.hh
@@ -871,7 +871,7 @@
     // Redundant ones are filtered out later on by the visited set.
     // According to https://www3.cs.stonybrook.edu/~rezaul/papers/TR-07-54.pdf
     // for practical performance this is faster then using a more advanced queue
-    // (such as a fibonaacci queue) with a fast decrease priority.
+    // (such as a fibonacci queue) with a fast decrease priority.
     for (unsigned i = 0; i < vertices_.length; i++)
     {
       if (i == vertices_.length - 1)
diff --git a/src/hb-serialize.hh b/src/hb-serialize.hh
index 7fee413..6615f03 100644
--- a/src/hb-serialize.hh
+++ b/src/hb-serialize.hh
@@ -279,7 +279,7 @@
     object_pool.release (obj);
   }
 
-  /* Set share to false when an object is unlikely sharable with others
+  /* Set share to false when an object is unlikely shareable with others
    * so not worth an attempt, or a contiguous table is serialized as
    * multiple consecutive objects in the reverse order so can't be shared.
    */
@@ -381,7 +381,7 @@
   // Adding a virtual link from object a to object b will ensure that object b is always packed after
   // object a in the final serialized order.
   //
-  // This is useful in certain situtations where there needs to be a specific ordering in the
+  // This is useful in certain situations where there needs to be a specific ordering in the
   // final serialization. Such as when platform bugs require certain orderings, or to provide
   //  guidance to the repacker for better offset overflow resolution.
   void add_virtual_link (objidx_t objidx)
diff --git a/src/ms-use/IndicPositionalCategory-Additional.txt b/src/ms-use/IndicPositionalCategory-Additional.txt
index 83a164e..5a33837 100644
--- a/src/ms-use/IndicPositionalCategory-Additional.txt
+++ b/src/ms-use/IndicPositionalCategory-Additional.txt
@@ -2,7 +2,7 @@
 # Not derivable
 # Initial version based on Unicode 7.0 by Andrew Glass 2014-03-17
 # Updated for Unicode 10.0 by Andrew Glass 2017-07-25
-# Ammended for Unicode 10.0 by Andrew Glass 2018-09-21
+# Amended for Unicode 10.0 by Andrew Glass 2018-09-21
 # Updated for L2/19-083    by Andrew Glass 2019-05-06
 # Updated for Unicode 12.1 by Andrew Glass 2019-05-30
 # Updated for Unicode 13.0 by Andrew Glass 2020-07-28
@@ -58,16 +58,16 @@
 # Indic_Positional_Category=Bottom
 0859..085B    ; Bottom # Mn   [3] MANDAIC AFFRICATION MARK..MANDAIC GEMINATION MARK
 18A9          ; Bottom # Mn       MONGOLIAN LETTER ALI GALI DAGALGA
-10AE5         ; Bottom # Mn       MANICHAEAN ABBREVIATION MARK ABOVE  # Overriden, ccc controls order
+10AE5         ; Bottom # Mn       MANICHAEAN ABBREVIATION MARK ABOVE  # Overridden, ccc controls order
 10AE6         ; Bottom # Mn       MANICHAEAN ABBREVIATION MARK BELOW
 10F46..10F47  ; Bottom # Mn   [2] SOGDIAN COMBINING DOT BELOW..SOGDIAN COMBINING TWO DOTS BELOW
-10F48..10F4A  ; Bottom # Mn   [3] SOGDIAN COMBINING DOT ABOVE..SOGDIAN COMBINING CURVE ABOVE     # Overriden, ccc controls order
+10F48..10F4A  ; Bottom # Mn   [3] SOGDIAN COMBINING DOT ABOVE..SOGDIAN COMBINING CURVE ABOVE     # Overridden, ccc controls order
 10F4B         ; Bottom # Mn       SOGDIAN COMBINING CURVE BELOW
-10F4C         ; Bottom # Mn       SOGDIAN COMBINING HOOK ABOVE        # Overriden, ccc controls order
+10F4C         ; Bottom # Mn       SOGDIAN COMBINING HOOK ABOVE        # Overridden, ccc controls order
 10F4D..10F50  ; Bottom # Mn   [4] SOGDIAN COMBINING HOOK BELOW..SOGDIAN COMBINING STROKE BELOW
-10F82         ; Bottom # Mn       OLD UYGHUR COMBINING DOT ABOVE      # Overriden, ccc controls order
+10F82         ; Bottom # Mn       OLD UYGHUR COMBINING DOT ABOVE      # Overridden, ccc controls order
 10F83         ; Bottom # Mn       OLD UYGHUR COMBINING DOT BELOW
-10F84         ; Bottom # Mn       OLD UYGHUR COMBINING TWO DOTS ABOVE # Overriden, ccc controls order
+10F84         ; Bottom # Mn       OLD UYGHUR COMBINING TWO DOTS ABOVE # Overridden, ccc controls order
 10F85         ; Bottom # Mn       OLD UYGHUR COMBINING TWO DOTS BELOW
 16F4F         ; Bottom # Mn       MIAO SIGN CONSONANT MODIFIER BAR
 16F51..16F87  ; Bottom # Mc  [55] MIAO SIGN ASPIRATION..MIAO VOWEL SIGN UI