lang – The unofficial WordPress Plugin Directory

Lang Attribute for the Block Editor

Add lang attribute to the text formatting toolbar in the block editor.

This wordpress plugin adds a meta box for specifying html lang="" language per post.

This plugin slice the language attribute for HTML tag, For example: lang="en-US" to lang="en"

Add an abbreviation format button to the formatting toolbar in the block editor.

Add a custom HREFLANG meta box on your post to manually edit the link between your post and a translation (which could be outside your domain).