We played a lot with my wife this game last weekend. Our children also wanted to play with it, because they saw it is a fun game. However they neither speak English and neither can read any language. My wife and my 7-years-old daugter created some homemade cards with Hungarian title and they drew pictures to the papercards. This wasn't worked so well... Then I realized the game would be better for the children and language dependent if we would have use cards with pictures (from Dixit or Mysterium).
They're using Dixit cards for one of the games in the Play-by-forum, it looks pretty interesting! I sent the link to a friend who loves Dixit, they're going to try Dixit Codenames at their next game night.