If I were looking for a better job abroad , what language other than English should I learn to help maximize my chance of securing a job in mechanical engineering ?
French, German, Spanish will be my recommendation, in that order. If you were to select by highest proportion speaking the language, then you may select Chinese, Spanish, Hindi, and Arabic.
Being bilingual or multilingual offers many benefits, including travel, education and better job opportunities.
I would recommend you Spanish and Chinese. I am a bilingual scholar competent in both Korean and English. Like Dr. Shah said, a bilingual ability will provide better and more opportunities to you.