YOU SAID:

I'm not sure how to explain it in Spanish, but once he jumped over a fence with spikes and hurt himself

INTO JAPANESE

私はスペイン語でそれを説明する方法が、かつて彼はスパイクとフェンスを飛び越えたし、彼自身を傷つけた

BACK INTO ENGLISH

I described it in Spain, but once he spikes and fence jumped over and hurt himself,