My personal view on this is python. Reason being, python is intentionally designed to be concise, yet readable. If python code is difficult to read, it's usually done that way intentionally.
Also, it is very good with data and string manipulation. While it isn't insanely picky about variable types, it's not exactly lax either. It is a good mix which allows for easy adaptations to many environments, making it not only very quick as a rapid prototyping language, but also very multipurpose for a very wide variety of tasks.