IIRC, at one point EVE had a lot more ‘official’ language channels, but they removed many of them back in Oceanus release in 2014. Presumably because, as already mentioned, it is hard for them to maintain adequate levels of moderation and supervision across multiple channels and multiple languages.
Player created channels are one workaround. Not sure if this thread is till updated but there used to be a list in
Player Created Language Channels.