I have lived 3 years and 49 weeks in Turkey. In this time I have not simply won the ability to speak with people in Turkey, but also people from all over Asia. Learning a language opens you doors to speak with not just the speakers of that language, but also speakers of similar languages. If you speak the Spanish then you can probably speak with the Italians. If you speak Russian then you can speak with Ukranians easily. Learning one language is learning to think in a way that speakers of more than one language probably use.