My sister has bonus skills (Romance and Idioms) on her computer, but I do not. Why is that?
Because she purchased them using lingots. You buy power-ups, bonus skills and other stuff at the lingot store. For more information, check out this link https://support.duolingo.com/hc/en-us/articles/204980630-What-is-a-Lingot- and if you want, check out this article, too: https://www.duolingo.com/comment/766899/Lingots-a-virtual-store-and-a-more-fun-way-to-learn Hope I helped!
Glad I could help HarleyQuinnLover, I wish you good luck in your Spanish learning journey, and if you have any other questions, never hesitate to ask. And Wonder Woman has both Batman and Superman on her side, we will put you and the Joker away and if you ever try to get revenge, we'll strike back harder XD I'm getting carried away ;D But yeah, never hesitate to ask questions, there are so many helpful people willing to help on duolingo and the discussions are great way to get both help and support from users.