I am allways happy when another flightcrewmember points out to me during briefing allready: "hey guys...guess what...i'd like english only today!!" That has been responded sometimes by: "ok happy with that...for the briefing and flight in airplane but the minute we walk out of the airplane either you talk to me in the language of the company (not an english speaking one) OR you don't talk to me (mostly us) AT ALL during layover!"
Usually that calms his fever a bit as worried about having to pay his "pints" (our half liters) alone (with his pounds), eat his "ounces" (our kilos)steack alone, measure his fuel uplift in "gallons-imperial or US ones" (our liters) alone, or drive his rented car on the (w?)right side alone trying to convert the 50km/h into miles...
Can't they do like anybody else?
I speak allways english only on the radio though...for everybody's interest. (except 12345)