[anotherhue]

Are we not allowed say Yanks anymore?

[mh-]

Yank here, you've certainly got my blessing. Can't imagine someone being bothered by it. I think of it as a demonym just like Brits or anything else.

[ASUfool]

Those with deep Confederate roots might be bothered.

Or Red Sox fans.

[SSLy]

Is the term also fine to use when trying to include the BIPOC citizens?

[SR2Z]

All Americans get to be called Yanks, and if the southerners complain, hey - they did lose the civil war.

[lucasban]

You can say what you want, whether or not people will understand what you mean or interpret it the way you intended is the more relevant question, in my opinion.