text: what language do you think in, if you are fluent in two or maybe three languages? i know that there are some who grow up in areas of the world where it is necessary to be fluent in several languages, just because of the mix of the population where they live. because of this, there is no true basic language one could call his own. i hope i made myself clear. the basic language is the language you use at home in your family.   to answer you question, i think in the language of the country i'm in or in the language i have to use the most in my daily life. yet, if there are a lot of internationals around, i end up thinking in a mix of all the languages i know and understand (english, french, spanish, italian, romanian, some german, some hungarian and so on)... and i have troubles finding my words in any of them! it's fun though to talk to each and every one in their own tongue!