It's polite to try and meet somebody half way, but I've dealt with people who want to lay out all the rules for communication and it typically boils down to a one-sided arrangement where the world is supposed to work for them, but they're unwilling to do the same for the world. Unless somebody has a real limitation (like ESL or a mental handicap), I just ignore these kinds of requests. Make a good faith effort to not be an asshole, but don't give an inch to petty dictators; they have damaged egos and get satisfaction from having people comply with arbitrary requests or demands, and asking for changes to your language is often just the beginning.