Music has no language?

I did not understand this 'Music has no language' thingy to start with. I mean, music meant essentially film music for me and I could hardly enjoy it unless I could sing along with it. (Bray along? There you go, indulging in ad hominem right away. This voice-shaming should also get people cancelled, I tell you.) And I could hardly sing along in a language that I did not know, especially when