diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 6cb1d96ef..6dec9e840 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -128,6 +128,7 @@ at the `suggestion` level and won't block merging.
 
 The following tests are at a `error` level and will prevent merging:
 
+- [AmSpelling](https://developers.google.com/style/word-list)
 - [Emdash](https://github.com/errata-ai/Google/blob/master/Google/EmDash.yml)
 - [Endash](https://github.com/errata-ai/Google/blob/master/Google/EmDash.yml)
 - [Exclamation](https://github.com/errata-ai/Google/blob/master/Google/Exclamation.yml)
diff --git a/vale-styles/FluentBit/AmSpelling.yml b/vale-styles/FluentBit/AmSpelling.yml
index 9a8ea2e30..f871b061e 100644
--- a/vale-styles/FluentBit/AmSpelling.yml
+++ b/vale-styles/FluentBit/AmSpelling.yml
@@ -1,8 +1,8 @@
 extends: existence
-message: "In general, use American spelling instead of '%s'."
+message: "In general, use US English spelling instead of '%s'."
 link: 'https://developers.google.com/style/spelling'
 ignorecase: true
-level: suggestion
+level: error
 tokens:
   - '(?:\w+)nised?'
-  - '(?:\w+)logue'
\ No newline at end of file
+  - '(?:\w+)logue'