Hypothetical question concerning languages in PMs.

[Septimus Faber]

I feel like I already know the answer to this one, but it's been bugging me, so I'll post it anyway.

The forum as a whole is English-only (broadly speaking) - does this apply to PMs? For instance (to pull an example out of a hat) there's a fairly sizeable Swedish contingent on GiantITP; would it be acceptable for them to communicate in Swedish within their PMs?

I'm asking this more out of curiosity than anything else, really.

[Jasdoif]

It does appear the forum rules apply equally to PMs and posts.

[Roland St. Jude]

It does appear the forum rules apply equally to PMs and posts.
That is correct.