From Qt Wiki
En Ar Bg De El Es Fa Fi Fr Hi Hu It Ja Kn Ko Ms Nl Pl Pt Ru Sq Th Tr Uk Zh
There's a template, LangSwitch, that makes a banner (see above) offering translations of a page, where they exist: enclose that in double curly braces to add the banner to your page. It enumarates rather more languages than you'll actually find categories for here. Where we do have translations, we should add them to the same categories as the English version and to a category named for their language; that category should be marked as in this Category:Translations.
This category has the following 22 subcategories, out of 22 total.
Pages in category "Translations"
This category contains only the following page.