Will my child become equally fluent in two languages?      It is important not to compare bilinguals with monolinguals in their language development. Bilinguals should be compared with bilinguals. Bilinguals are not two monolinguals inside one person. They own a unique combination of two languages that are both separate and integrated within the thinking system. While two languages are visible in production (e.g. speaking), in the thinking quarters of the brain, one feeds the other. One language helps the other to grow. In this sense, there is integration between the two languages. Ideas and concepts learned in one language can be easily transferred into the other language.