After the update to the latest build of the Windows 10 (that I applied today), the languages went back to the default, which is a mess. I'm using a US keyboard but somehow the UK keyboard appears on the language list, perhaps something to do with the fact that I'm living in the UK. I need this language list as I need to quite often change the langs between English and Japanese.
Googled a bit, and found this thread:
Not to be confused with the UK keyboard layout for English (United States). Adding this or removing this won't affect at all. Instead, you should press the button "+ Add a preferred language" and add "English (United Kingdom)". You can untick as much as possible. When installed, delete it. This worked for me.