Please, for the love of God, don't use the word tip when you talk about paying doctors.
Entertainers and bartenders get tipped. Doctors get paid.
(unless you are the barkeep who hired the entertainers
And, yes, I too think the language learning feature is messed up. I just learned how to speak and understand Ryl, Trando, Zabrak, and Rodeese, plus understand Shyriiwook, in less than 1 minute.
That's just too fast.
The Devs are aware of it, but I don't know what they plan on doing about it.