In Trek, at times child characters, Naomi, Mezoti...ect talking to other crew members, which would imply that they already have universal translators, I have seen UT's as implants. DS-9 episode Little Green Men, and have also seen them as part of their comm badges, (however I may be mistaken on that, you lose you badge and you're out of luck communicating with anyone). Since Namoi does not have a comm badge, I would suppose that she has the implant. At what age to you suppose they have UT implanted, also is there a learning curve to use the UT ???