4
If you study business or economics you should learn Standard Chinese.
It's complicated but as an American if you study or want to work as a businessman or as a CEO you will have some chances of having to comunicate with Chinese partners.
If you want Indo-European languages, you shall learn French and German. Dutch is the closest language to English, but in our days it's pretty useless to speak Dutch unless you want to live in the Netherlands, so after Dutch and scandinavian languages aside, French and German are the closest languages. German because it's germanic, and Germany is the wealthiest country of Europe, French had a lot of influence in English Language vocabulary specialy after the Norman invasion, France itself is also after Germany, the biggest economy and the most powerful country of Europe.
Among Romance Languages (putting French aside) I would advise you to learn Portuguese or Spanish. They are more international languages and you are more likely to find a Brazilian or a Hispanic person around the Globe than an Italian. Romanian is useless.
As for Slavic languages, Russian.
Bookmarks