I notice these forums themselves are a kind of multisite setup.
I have accounts on two of them, and in both my
I notice there is no way to edit any language setting.
This is quite unlike
where the user is free from the assumption that he prefers the default
I suppose themes cannot be chosen per-user either.
You see I was trying to help my friend do all this,
But I suppose if it is not possible even on these forums, it is just not
possible in WordPress.