How do I explain a failed degree in an interview? I did law and spanish, failed the spanish by one element. I repeated several times, but by the end, exhausted and defeated I couldnt face repeating it so its gone. ADVICE?

Don't even mention it, what are you thinking? Do you really think that they give you some bonus points just for taking a college course? Well they do not.  All that matters is if you received a degree or not.  If I was the employer giving you the interview,  you dropping out of that course would be marked down as a bad character trait. "He's a quitter", No initiative to complete tasks, etc. Best not to even mention it if you didn't complete the course. That's the way I see it.