I think everyone should start with an extra language.
The language system is very neat. Including English, there are eight languages in the Sindome universe, representing the cultural blend the world has undergone. Players are encouraged to make characters from foreign countries, and yet ridiculously few people put UE into learning any languages, even the ones from the places they're from. This is understandable, to an extent, as they're more focused on putting UE into things that will advance their characters and RP more than investing in a language system nobody uses (apart from the occasional character that speaks Japanese.)
What I've been running into that's becoming a massive pet peeve of mine is people get around not knowing the languages of the places they're from because they speak a language that, in the Sindome world, should not exist anymore. In recent memory I've witnessed examples of people claiming to speak French, some kind of Chinese, and even Farrokh. There are even people who CLAIM to speak a language, but when I switch to their supposedly native tongue they have no idea what I'm saying.
Playing characters from varying cultures adds flavor to RP and should be encouraged. Playing a character that starts with a language other than English, however, is a massive RP challenge because chances are, most people won't understand you (unless it's Japanese. SOME people will understand you then.) That is why I think there would be zero harm in giving everyone an additional language. It will do nothing but enhance RP and give people a reason to invest UE in languages, or even the cybernetic enhancements that let you understand them.
TL;DR Everyone should start with an extra language to reflect and promote cultural diversity and generate RP because nobody is using the system (understandably.)