Is this a joke? How is it "racist" if AC makes announcements in a language besides English and French?

Sometimes there are a lot of PAX booked on a domestic flight that connects to an international flight so AC might feel it prudent to provide service in a language for these travellers as a valued added service. Or sometimes one of the crew speaks a third language and decides to use it as well just for fun. Nothing wrong with that.

And guess what? I have been on a domestic flight where AC announced that service was available in Polish.