呵呵，可以注明用双语回答就可以了，我觉得这样大家都比较舒服了。另外，很多母语是中文的朋友也很希望你能帮助他们提高英语水平，毕竟大家都有一个共同的目标：提高外语水平.
hehe , You can mark as Answering in Chinese and English, I think it can make us comfortable in intercommunion. Besides, many people whose mother tongue is Chinese want you to help them with their English also. We have the same object after all: improve the level of foreign language.