Oh, my god! At last! Now I REALLY love you, Telltale, A LOT!
I watch the show on Fox España (cable channel), but many friends watch it on La Sexta. I also buy the PlanetadeAgostini comics and I agree with Javi-Wan, you should try contact their videogames division, maybe they make the things easier (or help to make a better translation, faithful to the comics).
Hope this is only the beggining!
PS: Did I say that I love you, guys?
PPS: If you also make dubbing (a good one) I'll buy two copies, I swear, but I'm fine with good subtitles