Language and location settings don't exist?

Where is your computer's location itself set to? Often times a computer or device like a phone or games console will set its language based features to whatever its location is automatically or manually set to. As a follow up question, are your apps in English
because you set them to that or were they automatically in English like it would appear how your Minesweeper is in regards to it being in Russian?

Go to the settings of your computer and manually mess with its language and location settings and see if that helps. You could also check to see what language Minesweeper is set to in the app (if the option exists) and what language and locations your Xbox
App is set to (which I know is something you definitely can do.)

Hey there vlad.

Unfortunately Romania is not an Xbox Live supported country which explains why you're unable to select it as your region. We're always looking to expand on more regions, be sure to keep an eye out for future announcements.

Easy fix mate.

Settings>

System>

Language and Location>

Set all 3: Language, Location, and Spoken Language to English and United States.

Hi, is English not an option in the location and language setting on the Xbox ?

https://support.xbox.com/xbox-one/console/system-settings

Language and location

The language and location settings allow you to change the language display information of your console. If you move to a different time zone or region, you should update your console settings here.

Language

This setting controls the display language of your console. Some games and apps will also detect this setting and adjust their display language accordingly.

Location

This setting controls your console region, including the region for Microsoft Store content.

Spoken language

The spoken language setting determines the language that will be used for voice commands.

Yes Settings>System>Language Location set to Australia.

The console then prompts to restart to apply Location and Language settings and all the errors, freezes and green screens start.