You are definitely correct, but you need to factor in the actions that puts someone in a place to get that environmental effect. If your friend had motivation t

You are definitely correct, but you need to factor in the actions that puts someone in a place to get that environmental effect. If your friend had motivation to learn the language they would presumably seek out ways to practice it (e.g engaging more with their colleagues or actively seeking documentation in the foreign language). One directly practical example, since I'm also an engineer living in a foreign country: a lot of the times when I first interact with someone they will ask me if I prefer to speak in English or in their language, and I will always take the opportunity to speak their language to get the practice in. Since this thread is about the similarity between learning languages and bodybuilding, I guess you could make the comparison between someone working a job that leads to natural exercise (e.g construction) and someone who works a more sedentary job but seeks out exercise on their own.