I got an email about this edit with the text Erledigt Tacsipacsi Awesome! Thank you! (I use plain text emails). I suppose it says “Erledigt” because @Perhelion uses German interface language. The on-wiki notification uses Hungarian text, as my interface language is Hungarian. So I think the email should also use my interface language, but if not, then the site default, and certainly not the mentioning user’s one, because doing so leaks an otherwise private preference of the user.
The issue is reproducible on commons beta(it seems to be commons wiki specific):
- user A changes user interface to German
- user A adds {{done}} {{U|User B}} (the edit in the ticket description) to any Talk page. Immediately {{done}} will be displayed as 'Erledigt' (even before saving the edit).
- user B has English UI and receives the notification in English:
But an email will have 'Erledigt' - the reported issue is confirmed.
To summarize:
- the issue is specific to commonswiki (since it's a multi-language wiki)
- the issue is present only in emails
- notifications/emails from lang wikis will display {{done}} template as Done disregarding the UI lang of a sender or of a receiver which is a correct behavior.