Memrise works a lot with the idea of memorizong words by seeing them again and again. And that is great.
But it is not, when there is a mispelling in one of them ! 
I am currently learning Spanish, for French native. And I can see as a translation of “cosas así” : “Des truc commeS ça” !
There is no “s” at the end of comme !..
Merry Xmas to all of you