I've read somewhere that if the meaning of a sentence is understandable, particles are eliminated as even japanese themselves are sometimes confused by them.
so, can i 'reduce' 何処で食べへ行きますか to 何処食べ行きますか?
and, if i'm talking to a japanese in japanese, who knows english, and don't understand a certain sentence he says, can i ask 英語でもう一度お願いします for him to repeat in English?
どうもありがとう