french, spanish or german or something else which language would improve my career oppurtunities? i am doing btech Chemical engg. in IT BHU.

i am doing btech Chemical engg. in IT BHU and want to do a 2 year diploma course in a foreign language in BHU itself simultaneously. which language do u suggest to me so that it would increase my career opportunities as a chemical engineer(on the basis of employment opportunities in industries.