diff --git a/format_docs/pdb/mobi.txt b/format_docs/pdb/mobi.txt
index a982dcd6d8..0adec2fdd8 100644
--- a/format_docs/pdb/mobi.txt
+++ b/format_docs/pdb/mobi.txt
@@ -3,7 +3,7 @@ from (https://wiki.mobileread.com/wiki/MOBI)
 About
 -----
 
-MOBI is the format used by the the MobiPocket Reader. It may have a .mobi
+MOBI is the format used by the MobiPocket Reader. It may have a .mobi
 extension or it may have a .prc extension. The extension can be changed by the
 user to either of the accepted forms. In either case it may be DRM protected or
 non-DRM. The .prc extension is used because the PalmOS doesn't support any file
diff --git a/format_docs/pdb/plucker.html b/format_docs/pdb/plucker.html
index 97432d7e67..d6eb8e62cd 100644
--- a/format_docs/pdb/plucker.html
+++ b/format_docs/pdb/plucker.html
@@ -1279,7 +1279,7 @@ within the anchor name string sequence below.</td>
 
 <td>String sequence</td>
 
-<td>A concatenated sequence of NUL-terminated strings, each an anchor name name. The relative
+<td>A concatenated sequence of NUL-terminated strings, each an anchor name. The relative
 location of an anchor name string in the string sequence represents its index into the anchor
 name data.</td>
 </tr>
diff --git a/manual/gui.rst b/manual/gui.rst
index d69370bb43..3ee6e742b9 100644
--- a/manual/gui.rst
+++ b/manual/gui.rst
@@ -383,7 +383,7 @@ You can set only one of the search options `Case sensitive searching` and `Unacc
 Equality searches are indicated by prefixing the search string with an equals sign (=). For example, the query
 ``tag:"=science"`` will match `science`, but not `science fiction` or `hard science`. Character variants are significant: `é` doesn't match `e`.
 
-Two variants of equality searches are used for hierarchical items (e.g., A.B.C): hierarchical prefix searches and hierarchical component searches. The first, indicated by a single period after the equals (``=.``) matches the initial parts of a hierarchical item. The second, indicated by two periods after the the equals (``=..``) matches an internal name in the hierarchical item. Examples, using the tag ``History.Military.WWII`` as the value:
+Two variants of equality searches are used for hierarchical items (e.g., A.B.C): hierarchical prefix searches and hierarchical component searches. The first, indicated by a single period after the equals (``=.``) matches the initial parts of a hierarchical item. The second, indicated by two periods after the equals (``=..``) matches an internal name in the hierarchical item. Examples, using the tag ``History.Military.WWII`` as the value:
 
   * ``tags:"=.History"`` : True. ``History`` is a prefix of the tag.
   * ``tags:"=.History.Military"`` : True. ``History.Military`` is a prefix of the tag.
diff --git a/manual/template_lang.rst b/manual/template_lang.rst
index 7650afbf68..78878829c3 100644
--- a/manual/template_lang.rst
+++ b/manual/template_lang.rst
@@ -646,7 +646,7 @@ In `GPM` the functions described in `Single Function Mode` all require an additi
 
 * ``raw_field(lookup_name [, optional_default])`` -- returns the metadata field named by ``lookup_name`` without applying any formatting. It evaluates and returns the optional second argument ``optional_default`` if the field's value is undefined (``None``).
 * ``raw_list(lookup_name, separator)`` -- returns the metadata list named by ``lookup_name`` without applying any formatting or sorting, with the items separated by separator.
-* ``re_group(value, pattern [, template_for_group]*)`` --  return a string made by applying the regular expression pattern to ``value`` and replacing each matched instance with the the value returned by the corresponding template. In :ref:`Template Program Mode <template_mode>`, like for the ``template`` and the ``eval`` functions, you use ``[[`` for ``{`` and ``]]`` for ``}``.
+* ``re_group(value, pattern [, template_for_group]*)`` --  return a string made by applying the regular expression pattern to ``value`` and replacing each matched instance with the value returned by the corresponding template. In :ref:`Template Program Mode <template_mode>`, like for the ``template`` and the ``eval`` functions, you use ``[[`` for ``{`` and ``]]`` for ``}``.
 
   The following example looks for a series with more than one word and uppercases the first word::
 
diff --git a/src/calibre/gui2/actions/__init__.py b/src/calibre/gui2/actions/__init__.py
index 4e61ebb765..8510454af7 100644
--- a/src/calibre/gui2/actions/__init__.py
+++ b/src/calibre/gui2/actions/__init__.py
@@ -20,7 +20,7 @@ from polyglot.builtins import string_or_bytes
 
 
 def toolbar_widgets_for_action(gui, action):
-    # Search the the toolbars for the widget associated with an action, passing
+    # Search the toolbars for the widget associated with an action, passing
     # them to the caller for further processing
     for x in gui.bars_manager.bars:
         try:
diff --git a/src/calibre/gui2/preferences/template_functions.py b/src/calibre/gui2/preferences/template_functions.py
index ef6d37b655..097e4f4621 100644
--- a/src/calibre/gui2/preferences/template_functions.py
+++ b/src/calibre/gui2/preferences/template_functions.py
@@ -303,7 +303,7 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
             return True
         if self.argument_count.value() == 0:
             if not question_dialog(self.gui, _('Template functions'),
-                         _('Setting argument count to to zero means that this '
+                         _('Setting argument count to zero means that this '
                            'function cannot be used in single function mode. '
                            'Is this OK?'),
                          det_msg='',