Generate translation file for Desktop and AppData files

[GreenLunar]

and add a note, video game is available only in English.

I am referring to files in https://github.com/freedoom/freedoom/tree/master/dist

[jewellds]

That's probably because the English text isn't done yet!
In my opinion, it doesn't make sense to have the game in other languages while people are still working out what the level names, monsters and story are in English.
I reckon when the English text is in a more complete and stable, that would be the best time to translate the game into other languages.

[GreenLunar]

I am willing to do anything that needs to be done to complete the English text.