Does it have any sense to learn more than one of the following languages? I'm referring to c++, Java, python, ruby and c#.

Answer 1

Yes, Compiled languages are very good for big projects.

Interpreted and dynamically typed languages are used for fast prototyping or for creating sinple applications.
Also they are used in web development

Answer 2

After this much time I think I got an answer myself. Learning more programming languages can be very useful. Since the concepts behind them are always the same (with few exeptions), it's good to repeat them over and over. The only problem is that you can, sometimes, get confused with some syntax. But i think this is a minor flaw.

Answer 3

Thanks, but i'll change my question. Does it have any sense to learn all of those languages?