There are too many inconsistent translations.... One section you say I'm wrong for saying "best friends" and now you're saying I'm wrong for writing "closest friends" as you previous corrected me..............

Hints for "언니" show "sister" but no "older sister".

i specified big sister and they said it was wrong this is such a mess

i had to resist the temptation to say that they were salty. don't give me that option Duolingo. it makes much funner sentences