How do you earn more gems on duolingo?

Related questions

1. Can you learn two languages at the same time?
2. How do you join a league in duolingo?
3. What are the duolingo leagues?
4. What are duolingo Lingots?
5. What does lingot mean?
6. What does admin mean on duolingo?
7. How do I leave a club in duolingo?
8. Will duolingo add more languages?
9. How does duolingo Leaderboard work?
10. How do I activate clubs on duolingo?

Tags

1. #required
2. #coming
3. #continue
4. #earned
5. #completing
6. #spend
7. #introduce
8. #lessons
9. #would
10. #first
11. #optional
12. #additional
13. #auxiliary
14. #learn
15. #duolingo
16. #clear
17. #lingots