I&#x27;m a native English-speaker, and I don&#x27;t speak anything else fluently, but I speak enough of a few languages to have basic conversations in them (that is, enough to go beyond just using phrases that I learned from a book).<p>Every now and then, I&#x27;ll forget a word in English but remember it in another language. My internal monologue tends to be English-ish (especially right now, when I&#x27;m composing a post), but if the sounds for a word are missing, the concept will fill its place...or sometimes the closest equivalent of whichever language I&#x27;ve been thinking about lately. I can <i>also</i> think almost completely in wordless concept-strings, but that sometimes feels forced.<p>Maybe I should mention that I learned a few words in French, German, and Spanish before I was 8, but the first time that I really studied a language in the usual sense was when I was about 12.