http://edition.cnn.com/2016/08/24/travel/multilingual-language-benefits/index.html
In many countries whose official language is not English, to learn English means to have a chance to work globally.
It's because English is widely recognized as common language around the world.
On the other hand, in English-spoken countries, to learn a specific language means to go to the specific country on the purpose of travelling or working.
So, it's difficult for English-speaking-people to choose which countries' language.
I think that trilingual person who can speak English, Spanish, Russian covers the world efficiently.It will be tips for them to choose a language to learn.
