As others have said very small, especially for someone not an expert in those languages. It should be done more for interest and generally broadening your skil

As others have said very small, especially for someone not an expert in those languages. It should be done more for interest and generally broadening your skills to make you a better developer. If you want to learn a new language to get a different kind of job start by considering what kind of job you want and then learn the most used languages in that bracket. Like c/c++ for game dev jobs, Objective C/Swift for iPhone development, java/kotlin for android and so on. For more generic dev jobs the answer would be that Java or C# would be a good place to start.