bombed...

i bombed a job interview today. they wanted a spanish speaker and though i can comprehend it, my speaking skills are pretty non-existent. i am now trying to write my thank you letters, which is proving to be difficult because i am feeling utterly dejected about the whole situation. what am i supposed to say? "sorry I don't speak spanish and don't have supervisory experience, but i think i can do a good job"? i didn't feel very confident about the interview and am not really convinced that i even want the job anymore. does anyone want to write my thank you letters for me? perhaps someone that wasn't there can be more optimistic about the whole situation.