@mpalmer thanks for getting back to me. I’m trying to work out if we can link to our forum and have it immediately display in a particular language. When I was talking about a flag in the header, I literally meant an image of a flag (e.g. a japanese flag) in the header or footer of the page that when clicked switches the UI to Japanese.
Probably better if I rephrase the question:
is it possible to switch the interface locale via URL query param, either for logged in or non-logged in users?
Dorian