diff --git a/.gitignore b/.gitignore
index 75d882f..4d8c898 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,7 +24,7 @@
 .bundle
 vendor/*
 
-# Temporaly
+# Temporary
 tmp/*
 texdoc-*.zip
 
diff --git a/script/texdoclib-config.tlu b/script/texdoclib-config.tlu
index 14df3f8..cfff39b 100644
--- a/script/texdoclib-config.tlu
+++ b/script/texdoclib-config.tlu
@@ -61,7 +61,7 @@ local function context_to_string(context)
     elseif context.src == 'def' then
         return 'from built-in defaults'
     else
-        return 'from unkown source (should not happen, please report)'
+        return 'from unknown source (should not happen, please report)'
     end
 end
 
@@ -380,7 +380,7 @@ function M.show_config_files(is_action)
     local w32_path = import_function('util', 'w32_path')
     local dbg_print = import_function('util', 'dbg_print')
 
-    -- controled print_func
+    -- controlled print_func
     local indent = is_action and '    ' or ''
     local print_func = is_action and print
         or function(s) dbg_print('files', s) end
diff --git a/script/texdoclib-search.tlu b/script/texdoclib-search.tlu
index abca807..3ab7ddd 100644
--- a/script/texdoclib-search.tlu
+++ b/script/texdoclib-search.tlu
@@ -31,7 +31,7 @@ local vanilla -- is this a vanilla TL or a re-package one without tlpdb?
 
 -- find the TeX Live root
 local function get_tlroot()
-    local tlroot = kpse.expand_path('$TEXMFROOT') -- it should be exisitng one
+    local tlroot = kpse.expand_path('$TEXMFROOT') -- it should be existing one
     get_tlroot = function() return tlroot end
     return tlroot
 end
@@ -40,7 +40,7 @@ end
 -- (or known basename according to basename_list)
 local function check_ext(file)
     file = file:lower()
-    -- has a known extention?
+    -- has a known extension?
     if texdoc.util.get_ext(file) ~= nil then
         return true
     end
@@ -517,7 +517,7 @@ end
 
 -- tlpdb means TeX Live Package DataBase and tlp means TeX Live Package
 
--- return an iterator that ouputs the keys in order
+-- return an iterator that outputs the keys in order
 local function opairs(t)
     local tkeys = {}
 
diff --git a/script/texdoclib-view.tlu b/script/texdoclib-view.tlu
index 594a641..abb226c 100644
--- a/script/texdoclib-view.tlu
+++ b/script/texdoclib-view.tlu
@@ -104,7 +104,7 @@ function M.view_file(filename)
             os.exit(C.exit_error)
         end
 
-        -- it is necessary to sleep a few secounds. Otherwise, the temporary
+        -- it is necessary to sleep a few seconds. Otherwise, the temporary
         -- file could be removed before opening it.
         viewer_replacement = tmpfile .. '; sleep 2; ' ..
             texdoc.config.get_value('rm_file') .. ' ' ..tmpfile .. '; ' ..
diff --git a/spec/config/buitin_spec.rb b/spec/config/builtin_spec.rb
similarity index 100%
rename from spec/config/buitin_spec.rb
rename to spec/config/builtin_spec.rb
diff --git a/spec/config/texdoc_cnf_spec.rb b/spec/config/texdoc_cnf_spec.rb
index ad6a31f..8b005b3 100644
--- a/spec/config/texdoc_cnf_spec.rb
+++ b/spec/config/texdoc_cnf_spec.rb
@@ -47,7 +47,7 @@
     end
   end
 
-  context "containes invalid line" do
+  context "contains invalid line" do
     let(:config_content) {
       <<~EOF
         XXX
diff --git a/spec/score/order_spec.rb b/spec/score/order_spec.rb
index b9cecdf..a72ed52 100644
--- a/spec/score/order_spec.rb
+++ b/spec/score/order_spec.rb
@@ -19,7 +19,7 @@
     end
   end
 
-  context "for documents with the same scores and different extentions" do
+  context "for documents with the same scores and different extensions" do
     before(:each) { run_texdoc "-lM", "texlive-en" }
 
     let(:res_list_head) do
@@ -29,7 +29,7 @@
       EXPECTED
     end
 
-    it "should be ordered by the extention position" do
+    it "should be ordered by the extension position" do
       expect(stdout).to start_with(res_list_head)
     end
   end
diff --git a/spec/support/helpers/texdoc.rb b/spec/support/helpers/texdoc.rb
index b66bc4d..f3a2d7e 100644
--- a/spec/support/helpers/texdoc.rb
+++ b/spec/support/helpers/texdoc.rb
@@ -48,7 +48,7 @@ def setup_texmf_trees
 
     # running the target texdoc
     def run_texdoc *args, interactive: false
-      # constract the arguments
+      # construct the arguments
       arg_str = ""
       arg_str = " " + args.join(" ") if args.size > 0
 
diff --git a/spec/support/shared_contexts/messages_context.rb b/spec/support/shared_contexts/messages_context.rb
index 17eea58..bdd0a62 100644
--- a/spec/support/shared_contexts/messages_context.rb
+++ b/spec/support/shared_contexts/messages_context.rb
@@ -8,7 +8,7 @@
     "Try `texdoc --help' for short help, `texdoc texdoc' for full manual."
   }
 
-  # functions for output line genaration
+  # functions for output line generation
   def error_line msg
     return "texdoc error: #{msg}"
   end
diff --git a/spec/unit/texdoclib_test.lua b/spec/unit/texdoclib_test.lua
index ccabb7e..d0c475f 100644
--- a/spec/unit/texdoclib_test.lua
+++ b/spec/unit/texdoclib_test.lua
@@ -35,7 +35,7 @@ end
 -- load texdoclib for tests bellow
 local texdoc = require('texdoclib')
 
--- Are all submodules sucessfully loaded?
+-- Are all submodules successfully loaded?
 do
     local names = {
         'const',
diff --git a/texdoc.cnf b/texdoc.cnf
index 2654af7..da57485 100644
--- a/texdoc.cnf
+++ b/texdoc.cnf
@@ -158,7 +158,7 @@ adjscore /latex-dev/ = -2
 # but they're still slightly better than other results with negative scores
 adjscore readme = +0.1
 
-# auto-generated README file shopuld not be preferred
+# auto-generated README file should not be preferred
 adjscore readme.texlive = -10
 
 ## Specific adjustments