He could play minecraft with his friends on a personal server. I think making servers is easy on Minecraft Bedrock (The minecraft version available on Xbox)
On my keyboard the layout is mostly the same, it's not like AZERTY or something like that. The problem is some keys like \ are behind modifiers (In this case AltGr+\), so most times when I've tried the Ctrl+ combination it hasn't worked (You can see how the keyboard layout is here
You can go to the developer settings and use the old frame limiter so you can set the refresh rate and frame limiter settings separately to work around the issue, i think
YES
https://www.f-droid.org/packages/net.minetest.minetest/