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Another meaning:

There are two classes of languages

* Interpreted, easy to learn, emphasize fast edit-debug cycles

* Compiled, harder to learn, more performant

Prototyping in python and rewriting in C++ or Rust is known as the "two language problem". Many of these efforts are trying to make the two language problem go away. Python -> Rust being the most in demand.

Note that both languages may be statically typed, functional etc.