I would say the given translation is informal and "Do you want something to eat?" is the norm in BE. Reported - 11 Jun, 2018
In teaching ESL grammar, I've learned that "anything" is the standard for questions. Report it...
When I use "want", DL puts "wish", when I put "wish" DL puts "want". Very pleasant.
The audio sounded like a true waitress asking hahah :) Pay attention and you'll see