Which sololearn badge is the most difficult to achieve ?

Question

earning badges

Answer 1

https://www.sololearn.com/Discuss/290419/?ref=app

Answer 2

mod, networker, certified tester, creater master

Answer 3

Code Ninja probably.

Answer 4

Code Ninja (50 codes in same language with 5+ upvotes).

Answer 5

I think they are many difficult badges, but the most difficult for me is the Networker badge. I don't think they will ever come to Uruguay or close(-.-)