When viewing achievements within the Xbox Dashboard, the achievements are showing in the language the region is set to. it is not showing the language the console is set to.

For example if your region is set to Greek, but the language is set to English UK, the dashboard will still show Greek as the language for the descriptions of the achievements.

Appears to be using the Regional Language not the Set Language from the Xbox.

Have checked with other games and apps, and all show in English, only the Minecraft Beta seems to be affected by this.