

Depends on the context, commenting in your native language is often totally okay.
Let’s say: a Japanese artist posting an art with Japanese caption, they would totally happy to receive comment from various language, displaying a cultural exchange.
This behaviour of native language comment is actually common in Asia and Africa, but not in Western countries…
Just be wary of joke or sarcasm that might interpreted as hate comment.
My instance and community already far better because we owned and managed them. Toxic users, just kick them. Toxic mods, just move to another community.
Social media is simply reflection of society. There’s always bad actors, whether in real life or online.