In Krita 4.4.1's New Documentation dialogue, the templates and their categories are all English only even when the locale is loaded. I found out that many other strings in Krita.pot (trunk) are marked as duplicate and thus untranslatable, but they can't be found in Krita.pot (stable). Did we mix things up there?
I just checked the Traditional Chinese and Japanese version. They are fine. So I think this is an issue on the Simplified Chinese localization team. I will contact them to investigate. Mark this as not-a-bug for now.
After I switched the locale back from Tranditional Chinese, the Simplified Chinese became normal. I guess the problem was caused by me running 5.0.0's appimage before running the 4.4.1 appimage. Not really a bug, just something we testers need to pay attention to, I suppose.