no, it isn't. people are going to see that alter as a white person even though they may not be. also this is my personal opinion, but I don't think the n-word should be said by anyone.

Yeah that's not ever going to be okay. Those alters are not perceived as poc, don't have the cultural background, or the social trauma. They can't fully understand the significance of that word.

Definitely not okay, it's still important to recognize the body you live in, both for others and for yourselves. I understand some alters may have different identities, we have members who appear in the headspace to be hispanic and speak spanish and love their culture, but we know our place as someone living in a white body, and that our ideas of those experiences themselves may be skewed. In general, this is a case of system responsibility, and you should likely try to encourage these alters to at least keep the slurs in the headspace to avoid offending others, or potentially changing the word to another one that is "their own" to call others (hopefully assuming you all have used it in the past in a friendly banter way) but is nonoffensive.

It really depends on the context of the way you say the word. An who you say it around. White people or anyone else will feel uncomfortable an label you a racists. From experience I speak on, literally almost every Black person in America says Nigga as in many forms of context. Such as being happy excited mad angry sad. If you want to say this word find people to hang out with who say it. Don't say the word with a ( ER) that isn't ok ever.