Not 100% sure whether this is bug or as intended, but... in SK discussion a brief derail question about bard training led to:
from TadaceAce (thanks).
Hmm, thinks I, I could have sworn it still said the spell skills. Is it supposed to change the text? Because it does train the bard skills but... it's not obvious which to choose
(Edit to say - if this is as intended feel free to punt to Bard area as an FYI)