Language change (inside your application) is not affected by desktop APIs. It is a local feature. Perhaps some previous js errors lead to loading issues (check developer console).
Regarding angular 14 upgrade: Yes it is recommended to upgrade and rebuild is done by your dev environment (if set up in your angular.json and package.json) or you CI if you have. There should be guide for merging upstream changes. Coming soon in COnX Info
Since I am still in development, I was thinking I will just download the new supersonic archetype with the 1.3.1 Snapshot and move my source code into it. Feels somehow easier. Do you see any downside to that?
Ok thank you!So I'll wait till tomorrow for 1.3.1 :-) .Btw you were right about the console error for language. The en.json had missing commas :-(.