Depends on where your target workplace will be located. For the Americas then Spanish would definitely be the primary, French if you want to head for Canada. For Europe I'd go with French and German probably. If you want to head East, Mandarin and Japanese, or Hindi /Punjabi if you were thinking more of the Indian area. Think about where you'd like to travel or work, then see what their official and secondary languages are. If you plan to stay in the US and want to learn languages for business relationships, you could try seeing who the main trading partners/client base is for the industry you want to work in and use that to research the language you may want to learn.