No one is claiming Chinese programmers should only code in Chinese, but to assert that they or anyone must code in American English for the convenience of Western programmers seems absurd. Should they also be forced to write all of their novels and perform all of their movies and music in English as well?

We live in a multicultural world, one for which English as a default doesn't make sense in every context. Yes, it may be the case that Chinese, Spanish, Greek, German, Arabic, or other non-American ideogram using programmers write code primarily meant to be used and understood within their own culture. I see nothing wrong with that.