If a template uses translation switching, just go to
https://wiki.teamfortress.com/wiki/Template:Template name
and edit the page to add the missing translation(s).
If the template uses a common string, then edit the string in the common strings dictionary.
Also, please remember to keep translations in alphabetical order, the only exception being en, which always goes first (en, ar, cs, da, de...).
I hope this helps. If you have any questions, don't hesitate to ask. - BrazilianNut (talk) 19:21, 31 August 2020 (UTC)