diff --git a/content/rules/bf051a/index.md b/content/rules/bf051a/index.md
index 61471db34..56658e319 100644
--- a/content/rules/bf051a/index.md
+++ b/content/rules/bf051a/index.md
@@ -131,7 +131,7 @@ This `html` element has a `lang` attribute with a [known primary language tag][]
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-This `html` element has a `lang` attribute with a [known primary language tag][].
+This `html` element has a `lang` attribute, but it is not a [known primary language tag][].
```html
@@ -141,7 +141,7 @@ This `html` element has a `lang` attribute with a [known primary language tag][]
Open in a new tab
-This `html` element has a `lang` attribute with a [known primary language tag][].
+This `html` element has a `lang` attribute, but it is not a [known primary language tag][].
```html
@@ -151,7 +151,7 @@ This `html` element has a `lang` attribute with a [known primary language tag][]
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-The `lang` attribute of this page is an [iso 639.2][] three letters code, which has no [known primary language tag][].
+The `lang` attribute of this page is an [iso 639.2][] three-letter code, which has no [known primary language tag][].
```html