There's really no reason it couldn't service other languages as it is. There's admittedly no language filter, but topics could be made to allow people who don't primarily speak English to find one another and discuss things together.
If you'd like to see more variety in languages, just invite friends who speak the language you want to see better represented and help get that ball rolling ;). Language oriented features would only help if enough people were using it, so that's the first step.
WWW is not a country where you can decide what language is better or not! It could be good very good to have different language ! this is my personal opinion!
Check the answers by @donkeypong and @pfunk
My apologies if it came off like I was saying English is somehow better. That wasn't my intention at all. If its any consolation, I find English to be a terrible language to be honest lol
I was just saying you can already use whichever language you choose here, the real factor is having other people who can also speak that language to discuss things with. For the moment, most users here speak English because the community is still small, but if more non-English speaking users join I expect you'll see lots of languages represented here soon enough. That would be a great thing to see, I agree with you :)