Apart from making the site language-localized (and who is going to do that?),(...)
/me rises his hand
I will. I swear for my keyboard that I will translate all the documentation from PerlMonks FAQ and all the (?:relevant|interesting|important|historical) articles that pleases the gods.
I think that having one page that collects all the languages into which documentation has been translated is the simplest solution.
I've done this already. Please take a look at the "Portuguese Nodes Index".
For the site FAQs, I think a “This document is also available in:” box at the top of the FAQ would be simplest. Is this a problem for anyone?
Not a problem, even to me. Thank you for your suggestions.