For non-native English Speakers

I'm always intrigued by people who know more than one language.

What language do you think in? What language do you dream in? What language does your family speak?

I speak about 4 languages fluently.
In my head, I guess I kind of "switch languages" without the need to convert to another language to understand what they're saying, although sometimes I'll admit I'll do it sometimes. In my dreams the languages tend to be more so based either on Japanese or English. As for my family, they speak Arabic, English, and Spanish. We're a multi-lingual family