Instead of having, various compilers for various languages, there can be a common compiler.this can be done in 2 ways,

1.
having a middle language between the machine code (ones which are in hex codes and high level codes), so that every code is converted to this middle code before being converted into machine code.

2.
building a platform where various files of various compilers can be brought together as a structure with pillars, each pillar is a compiler in it's own. they jointly make a platform on which code languages can be written in multiple languages and compiled as per the code block.