Best language to learn for business major (Accounting) - Page 2
Learn a Romance language because if you learn one the others all become much, much easier and the Romance-speaking countries are the only countries in Western Europe where English is not widespread. Plus because of their linguistic proximity to Latin they will also improve your formal and technical English.
Trying to learn Mandarin for business reasons is dumb especially if you're trying to learn it in the US at a university.
+1. Or, again, learn a language simply for the underlying cognitive benefits, not necessarily with the intention of doing much with it or speaking with native speakers beyond what Globe mentioned. Bilingual speakers almost always do better on mathematical tests, spatial, perceptual, and analytic reasoning, etc. You don't gain these consciously, but they develop over time as your brain adapts new pathways required by the second language that were not in the first.
So, in this way, why's idea seems a good one. Chinese, Japanese, or Korean in theory would be good for your brain as they require very different neural patterns than English, but before you'd really feel any of the effects you'd have to become fairly fluent... which probably won't happen or would require an enormous effort with little reward.
Given that the OP already has Spanish, another romance language (or even Latin itself) would be the best bet.
If you want to learn a language for resume purposes, you would need to learn it to near fluent proficiency for it to matter on your resume for most jobs. If you are already in undergrad, that would be pretty difficult to achieve in the limited amount of time you have.
In addition, language skills don't seem particularly useful for accounting. But I guess a lot of people don't like accounting after a couple years, so having non-accounting skills could help you find another career. In which case, it's really up to you to choose a language you want to learn. If it helps you choose a language, I find the people that learn languages the best are people who are genuinely passionate about that language, because they try every chance they have to read/listen/write to improve.