diff --git a/.github/actions/spelling/excludes.txt b/.github/actions/spelling/excludes.txt
new file mode 100644
index 00000000..8bf19440
--- /dev/null
+++ b/.github/actions/spelling/excludes.txt
@@ -0,0 +1,3 @@
+^package(?:|-lock)\.json$
+^\.github/actions/spelling/
+ignore$
diff --git a/.github/actions/spelling/expect.txt b/.github/actions/spelling/expect.txt
new file mode 100644
index 00000000..91463e72
--- /dev/null
+++ b/.github/actions/spelling/expect.txt
@@ -0,0 +1,107 @@
+anum
+args
+argv
+asdf
+baz
+blerg
+bnum
+Browserified
+BUILDIDENTIFIER
+CARETLOOSE
+CARETTRIM
+cmp
+COERCERTL
+COMPARATORLOOSE
+COMPARATORTRIM
+compver
+concat
+ctor
+dirname
+ecomp
+ent
+enum
+eslint
+fallthrough
+fooblz
+fpr
+FULLPLAIN
+github
+glorp
+gtfn
+gtlt
+gtr
+hilo
+http
+HYPHENRANGE
+HYPHENRANGELOOSE
+instanceof
+javascript
+json
+jw
+kinda
+linux
+LONECARET
+LONETILDE
+LOOSEPLAIN
+lte
+ltefn
+ltfn
+MAINVERSION
+MAINVERSIONLOOSE
+metadata
+minver
+neq
+neveragain
+NONNUMERICIDENTIFIER
+notready
+npm
+numberify
+NUMERICIDENTIFIER
+NUMERICIDENTIFIERLOOSE
+otherbuild
+preid
+preload
+premajor
+preminor
+prepatch
+PRERELEASEIDENTIFIER
+PRERELEASEIDENTIFIERLOOSE
+PRERELEASELOOSE
+rcompare
+readdir
+Refactor
+regexp
+rsort
+rtl
+rv
+sadf
+Schlueter
+semver
+sneks
+src
+Standalone
+stderr
+stdout
+stringify
+substr
+sut
+sys
+TILDELOOSE
+TILDETRIM
+TODO
+tokenizing
+tostring
+tpr
+typeof
+ubuntu
+usr
+utf
+webpack
+xm
+xp
+xrange
+XRANGEIDENTIFIER
+XRANGEIDENTIFIERLOOSE
+XRANGELOOSE
+XRANGEPLAIN
+XRANGEPLAINLOOSE
diff --git a/.github/actions/spelling/patterns.txt b/.github/actions/spelling/patterns.txt
new file mode 100644
index 00000000..fa520905
--- /dev/null
+++ b/.github/actions/spelling/patterns.txt
@@ -0,0 +1 @@
+\\[brn]
diff --git a/.github/workflows/spelling.yml b/.github/workflows/spelling.yml
new file mode 100644
index 00000000..db74f454
--- /dev/null
+++ b/.github/workflows/spelling.yml
@@ -0,0 +1,13 @@
+name: Spell checking
+on:
+  push:
+
+jobs:
+  build:
+    name: Spell checking
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2.0.0
+      with:
+        fetch-depth: 5
+    - uses: check-spelling/check-spelling@prerelease