I agree that PG should remain English only, in the sense that all conversations should be in English. That makes perfect sense. However, I think that as a community, PG can play a role in cultivating non-English privacy communities and should.
IMO, having different posts dedicated to promoting voices and communities that talk about privacy issues in specific languages would be a huge game changer. Those voices would include investigative journalists, authors, news outlets, non-profit organizations, forums, and content creators that focus on privacy issues in those languages.