[sejje]

I didn't, but I don't think it would work well on an established English-only forum.

It should be an intentional place you choose, and probably niche, not generic in topic like Reddit.

I'm also open to the thought that it's a terrible idea.

[monerozcash]

I think the audience that would be interested in this is vanishingly small, there exist relatively few conversations online that would be meaningfully improved by this.

I also suspect that automatically translating a forum would tend to attract a far worse ratio of high-effort to low-effort contributions than simply accepting posts in a specific language. For example, I'd expect programmers who don't speak any english to have on average a far lower skill level than those who know at least basic english.