You can try translation programs, but be careful. These programs provide direct translations and may not provide the best words to convey the proper meaning or feeling or what you're trying to impart. You'll need to proofread and edit your articles well.
I have used them going both English-to-Spanish and Spanish-to-English. These will get you in the ball park but you'll still have a lot of work to do. Having a fluent bilingual person proofing it will help tremendously.