diff --git a/config/locales/server.en.yml b/config/locales/server.en.yml
index fbf2e220090..e750cc358de 100644
--- a/config/locales/server.en.yml
+++ b/config/locales/server.en.yml
@@ -2974,6 +2974,7 @@ en:
     first_mention:
       name: First Mention
       description: Mentioned a user in a Post
+      long_description: This badge is granted the first time you mention someone's @username in your post. Each mention generates a notification to that person, so they know about your post. Just begin typing @ (at symbol) to mention any user or, if allowed, group – it's a convenient way to bring something to their attention.
     first_onebox:
       name: First Onebox
       description: Posted a link that was oneboxed