Tirips on "[Plugin: Polylang] Multilang comments + hightlight post"

You gave the solutions to remove comment filter

http://wordpress.org/support/topic/multilang-comment

"> but I don't know where do I put this function (I'm novice and I want to show all comments, whatever the language).
Second question : I modified my function.php so posts are highlighted according to their status (draft, published, future...). Is it possible to highlight (for example) all the english posts in one color and french ones in another ?
Thanks and forgive my poor "anglais de français".

http://wordpress.org/extend/plugins/polylang/