"leet" is kind of a written language that looks like this : "1337 5P34K"
check out wikipedia, it's good to know about it.
It doesn't matter for my question, as I already solved this part.
Thanks a lot for your try, DANGER SLANT looks like a good answer, I tried it, but it isn't the awaited solution sorry.
I think it's really leet related, and maybe with non official english words, like slang words...
Thx a lot anyway.