🔨(frontend) email invitation in invited user's language

- language for invitation emails => language saved on the invited user
- if invited user does not exist yet => language of the sending user
- if for some reason no sending user => system default language

CHANGELOG.md

@@ -32,6 +32,7 @@ and this project adheres to
 
 - 🐛(backend) allow any type of extensions for media download #671
 - ♻️(frontend) improve table pdf rendering
+- 🐛(email) invitation emails in receivers language
 
 
 ## [2.2.0] - 2025-02-10