So I made the test of installing WxT 5.4.x in French, and almost all the text/label was translated except when selecting the WxT Extensions:
The resulting site was ok, except that I couldn't the default migrate content in the step here: https://drupalwxt.github.io/docs/general/installation/
Also the wording "Search website" in the top search bar doesn't have any French translation.
I know it doesn't sound like a big deal to fix now, but I wanted to do some experiments and got this :)
Active
5.4
Miscellaneous