Not sure the new edition will work like that.
The old T2k was more skill based, but it seems that in the current draft, the game only has twelve skills — four basic attributes, and three skills per attribute. Skills can then be further "fine tuned" with specialties.
"Languages" can of course made one of the three "intelligence" based skills, with individual languages being separate specialties — and this might already be the case, for all I know; in which case; case closed.
But if not ... then I have difficulty seeing how it would work.
The skills presented so far do not include language.
Strength skills: heavy weapons, melee, stamina.
Agility skills: driving, mobility, ranged combat.
Intelligence skills: recon, survival, tech.
Empathy skills: command, manipulation, medical aid.
I would argue against language being an intelligence based skill. It should be based on Empathy. Trying to understand what someone is communicating without knowing their spoken language requires intuitive social interactions.
Character background can include what languages you can speak, and your fluency level. Learning a new language or improving your fluency can be the same as with skills.