The language settings in win 10 default to US English, even if you change them, they just go back to US English. I can see three optional upgrades in there but Windows has never forced me to dl them.
In settings/time & language/Region & Language, do you have more than one language under the Languages heading? If you only have US it might be trying to help.
Do you use the windows store at all as the language packs get downloaded through it as well as Windows update.