A ban on foreign languages isn't practical on here.

Is using a few French words or phrases to be prohibited, and how many words is fine and how many is too much? Is supplying a list of cuts of meat in Spanish to be prohibited, or is it just allowed when there's a side-by-side translation? Is part of an article or promotion that came in a foreign language prohibited from being posted in part or in whole unless accompanied by a translation, and how accurate does that translation have to be? Is insulting someone in Nooristani ok since the phrase translated into English by most non-locals sounds ok when it's really an insult in the original? What about prohibiting a nice phrase in English that is translated into Nooristani but is actually an insult in Nooristani? Are only languages that use Roman alphabets allowed? And so it goes.

I like that the general medium of communication is English here, but that can be encouraged by the FT community without some kind of mandated language or prohibition on other languages.

For most situations, I trust that if something is posted in a foreign language that another FTer doesn't understand, someone will usually step up to the plate to help out the FTer who doesn't know the langauge. Things will tend to gravitate back to English here without a hard line in the sand being drawn and enforced. And most people contributing here recognize that it's helpful to more members today to post in English.