Remove unknown locale qaa-Latn from windows

Got a fresh window 10 installation where I configure US keyboard as default and added Greek as well (the language with π and Σ symbols). I noticed that when I was switching languages a 3rd locale (qaa-Latn) appeared in the list which I couldn't remove from the windows list. In my case the keyboard was emitting Greek characters but the windows spelling couldn't recognize the words. In order to remove the extra locale I had to use the following powershell.

Unwanted languages in the language bar.

A few days ago, i noticed that i had in my language bar 5 language options, instead of 2 that i had configured for my English Windows 7. I checked it out and i had, for no obvious reason, Japanese (JP), Chinese (CH) and Korean (KO). I looked in my "Text Services and Input Languages" where i could only see the Greek and English keyboards that i had installed. Reboot didn't help so in order to get rid of them, i had to manually add them and after applying the changes i removed them. That worked for me and now i only have my original keyboard settings. I have no idea how i got them there in the first place...

Just for reference, the steps where:

1. Open "Text Services and Input Languages"
• Right click on the Language bar → Settings...
  OR
• Control Panel → Region and Language → Keyboards and Languages → Change Keyboards... 
2. Click Add...
3. Select the Keyboards you want to add. In my case:
• Chinese (Simplified, PRC) → Chinese (Simplified) - US Keyboard
• Japanese (Japan) → Japanese
• Korean (Korea) → Korean
4. Click OK
5. Click Apply
6. Select and click Remove each language you don't want.

Update [16/03/2011]:

According to Sinsoul's comment below, the reason appears due to installed MS Office profiling tools. He suggested that you should also remove all unwanted languages from the language options in office profiling tools. Here's how:

Start -> Microsoft Office -> Microsoft Office Tools -> Microsoft Office 2007 Language Settings

On the right list (labeled "Enabled editing languages") select each language you don't want and click Remove.