Ostensibly, if I want to learn two languages, I write an interpreter for the one in the other. In reality, I try to make a habit of using it whenever I need to

Ostensibly, if I want to learn two languages, I write an interpreter for the one in the other. In reality, I try to make a habit of using it whenever I need to do anything small (from simple arithmetic to implementing some graph algorithm I don't understand yet). Couple this with a habit of looking for better ways to do things that come out clunky and you're off! In real reality, I usually dismiss languages on first sight because I don't like their complicated syntax.