I think this explains why my old computer was so confused about languages. The windows apps were in Finnish, system settings etc. were in English. Then some parts of Google stuff were in Turkish, some in Finnish, and some others were in English. Every now and then some random app would appear and surprise me in Turkish. It was truly impossible to tell what language would appear after each click.
It was originally running windows 7 with English as the system language. Some software were installed while I was in Turkey, some (including windows 10 upgrade) were installed after I moved to Finland. Now I’m learning that my computer couldn’t handle this gracefully :)