Of course not, it wouldn't be a "no, you can't request this pronoun". It would be "sure, but mind you that I have no clue how to talk about you in non-English

Of course not, it wouldn't be a "no, you can't request this pronoun". It would be "sure, but mind you that I have no clue how to talk about you in non-English languages". And in some languages it's more than just the pronouns - for example, in some languages verbs may be declined according to a grammatical gender (a concept that almost doesn't exist in modern English and not really inferable from just "xir").