In my house, my parents used to always speak to me in a mixture of Kannada, a south Indian Dravidian language, and English. Technically, being taught to use English grammar and the fact that I think in English makes English my mother tongue. Due to my knowing Kannada however, I can pronounce words in many other languages much better than most of my friends. I'm also learning Spanish, and know a bit of Arabic, French, Urdu, Hindi, Greek, and Louisiana Creole. I never really have the motivation to learn to speak a language fluently.