this is ironic that i find you talking about native speakers who expect that others know their languages. the situation is very different here as Egyptians or Arabs in general believe that foreigners don't know a word of their language so they automatically start communicating in English with any foreigner. that actually makes foreigner students who study arabic very angry as they find that hinder their attempts to improve their arabic through communicating with natives. i don't know if this is relevant, i just wanted to share it with you.
