diff --git a/frontend/apps/filemanager/filemanagercollection.lua b/frontend/apps/filemanager/filemanagercollection.lua
index 7072578d2..c08870af0 100644
--- a/frontend/apps/filemanager/filemanagercollection.lua
+++ b/frontend/apps/filemanager/filemanagercollection.lua
@@ -1388,7 +1388,7 @@ function FileManagerCollection:searchCollections(coll_name)
                     -- Fortunately, this is run in a subprocess, so we won't be affecting the
                     -- main process's crengine state or any document opened in the main
                     -- process (we furthermore prevent this feature when one is opened).
-                    -- To avoid creating half-rendered/invalide cache files, it's best to disable
+                    -- To avoid creating half-rendered/invalid cache files, it's best to disable
                     -- crengine saving of such cache files.
                     if not self.is_cre_cache_disabled then
                         local cre = require("document/credocument"):engineInit()
diff --git a/frontend/document/document.lua b/frontend/document/document.lua
index 1308e0630..30f4ede2c 100644
--- a/frontend/document/document.lua
+++ b/frontend/document/document.lua
@@ -486,7 +486,7 @@ function Document:renderPage(pageno, rect, zoom, rotation, gamma, hinting)
     -- Make the context match the rotation,
     -- by pointing at the rotated origin via coordinates offsets.
     -- NOTE: We rotate our *Screen* bb on rotation (SetRotationMode), not the document,
-    --       so we hardly ever exercize this codepath...
+    --       so we hardly ever exercise this codepath...
     --       AFAICT, the only thing that *ever* (attempted to) rotate the document was ReaderRotation's key bindings (RotationUpdate).
     --- @note: It was broken as all hell (it had likely never worked outside of its original implementation in KPV), and has been removed in #12658
     if rotation == 90 then
diff --git a/frontend/document/koptinterface.lua b/frontend/document/koptinterface.lua
index e97d7b058..30b7cad6a 100644
--- a/frontend/document/koptinterface.lua
+++ b/frontend/document/koptinterface.lua
@@ -297,7 +297,7 @@ function KoptInterface:reflowPage(doc, pageno, bbox, background)
         kc:setPreCache()
         self.bg_thread = true
     end
-    -- Caculate zoom.
+    -- Calculate zoom.
     kc.zoom = (1.5 * kc.zoom * kc.quality * kc.dev_width) / bbox.x1
     -- Generate pixmap.
     local page = doc._document:openPage(pageno)
@@ -1433,7 +1433,7 @@ end
 local function get_pattern_list(pattern, case_insensitive)
     -- pattern list of single words
     local plist = {}
-    -- (as in util.splitToWords(), but only splitting on spaces, keeping punctuations)
+    -- (as in util.splitToWords(), but only splitting on spaces, keeping punctuation marks)
     for word in util.gsplit(pattern, "%s+") do
         if util.hasCJKChar(word) then
             for char in util.gsplit(word, "[\192-\255][\128-\191]+", true) do
diff --git a/frontend/ui/widget/bookmapwidget.lua b/frontend/ui/widget/bookmapwidget.lua
index 8e8c3ee7c..69bdfced9 100644
--- a/frontend/ui/widget/bookmapwidget.lua
+++ b/frontend/ui/widget/bookmapwidget.lua
@@ -618,7 +618,7 @@ function BookMapRow:paintTo(bb, x, y)
             alt_bb = glyph.bb:rotatedCopy(indicator.rotation)
         end
         -- Glyph's bb fit the blackbox of the glyph, so there's no cropping
-        -- or complicated positionning to do
+        -- or complicated positioning to do
         -- By default, just center the glyph at x
         local d_x_pct = indicator.shift_x_pct or 0.5
         local d_x = math.floor(glyph.bb:getWidth() * d_x_pct)
@@ -759,7 +759,7 @@ function BookMapWidget:init()
         }
     end
 
-    -- No real need for any explicite edge and inter-row padding:
+    -- No real need for any explicit edge and inter-row padding:
     -- we use the scrollbar width on both sides for balance (we may put a start
     -- page number on the left space), and each BookMapRow will have itself some
     -- blank space at bottom below page slots (where we may put hanging markers
diff --git a/frontend/ui/widget/inputdialog.lua b/frontend/ui/widget/inputdialog.lua
index 8ab3340af..0887e725e 100644
--- a/frontend/ui/widget/inputdialog.lua
+++ b/frontend/ui/widget/inputdialog.lua
@@ -643,7 +643,7 @@ function InputDialog:toggleKeyboard(force_toggle)
     -- Remember the *current* visibility, as the following close will reset it
     local visible = self:isKeyboardVisible()
 
-    -- When we forcibly close the keyboard, remember its current visiblity state, so that we can properly restore it later.
+    -- When we forcibly close the keyboard, remember its current visibility state, so that we can properly restore it later.
     -- (This is used by some buttons in fullscreen mode, where we might want to keep the original keyboard hidden when popping up a new one for another InputDialog).
     if force_toggle == false then
         -- NOTE: visible will be nil between our own init and a show of the keyboard, which is precisely what happens when we *hide* the keyboard.