If you spoke several other languages you might be aware that there are thong message boards in other languages. Some are independent messages boards that just deal with thongs, while others are more general,. covering underware and swimwear too. I know that some languages like German are well served by multiple message boards, but I suspect less popular languages are less well served, if at all. 

The problem for any message board is creating a community of common intrest. You need enough people who speak that language and that are interested enough in the subject.  Enough people to create, maintain and contribute to a message board. Because of the number of people in the world who both speak English and who wear thongs to the beach this English speaking board has that critical mass.

Past message boards, thong boards that existed before this one, showed why we have a need for regular moderation.  To moderate a board the moderator must speak the language. 

For the board to be useful to the participants the members must understand the language used.  This is why most message boards exist in a single language. This one happens to use English. This dos not preclude you, or anyone else, from setting up a similar message board in a parallel language universe.  A bit like the dark matter in the universe, the existence of parallel threads in a diffrent language plane will only be of tangential intrest to the English speakers. 

So go ahead, if you want to create a message board for people who are Koren thong wearers, feel free. You may have to compete with existing Koren thong wearing groups but this is the challenge of competing in a foreign language.

Until such time as a reliable babelfish is built into your web browser I suspect each language group will tend to talk amongst them selves.