Buying new Spanish learning skills
Don't you think that new skills cost to much linerots (or gems).
No. By the time your Spanish is good enough for you to enjoy the "flirting" (super cheesy) or "Idioms" (super hard) bonus skills, you'll be swimming in lingots and complaining that there's nothing to do with them and they're just piling up.
If you try to buy them early you'll just get frustrated.