I'd certainly never considered a language policy, and really don't want to impose one, but can we at least ask that people consider others with their signatures?
I can't speak or write Dutch (for example), so if I did a badly spelt and nonsensical Dutch signature I would imagine it could cause offence to any Dutch people reading it.
So perhaps our posting signatures should be limited to languages that are either our first language or a language we are fluent in.
Languages are an important part of a country's culture, and this is a site that spans all the countries of the UK.
On one hand if somebody has a genuine interest in learning a language then that should be appluaded and encouraged, but bits of different languages, possibly not making a lot of sense, crop up in post subjects, messages, photo votes etc., then at best it will irritate people and at worst insult.
So basically, if you're going to use your 2nd language in your signature, or scattered around other bits of the site, that's fine as long as you do it properly! Otherwise don't be surprised if it annoys a few people.
Now then, can I get back to mines please ;)
my orders are to sit here and watch the world go by