Yeah it's a really bizarre default setting, either there needs to be a way to capture language settings during signup or it needs to be made really, REALLY obvious to anyone who only has "undetermined" selected that they're missing at least one language.

Apparently the languages can also be limited instance-wide too, which complicates matters. The admin of startrek.website thought he was doing everyone a favour and simplifying things, at first, by limiting all user accounts on there to undetermined. But of course it just meant they were all missing posts tagged with an actual language.