How do different programming languages cooperate?

Question

Can different programming languages work with each other in a larger project? If so, how?

Answer 1

Of course, for example, C++ can work with Assembler or scripting languages like LUA, HTML works with CSS, JS or PHP.

Answer 2

Here is one use case or example. A large project can have several modules or processes. These processes can be implemented in different languages but can exchange data with each other via memory, files and network.

Answer 3

If you use different languages for data Manipulation, you could use the JSON data format as an Interface between the different languages.

Answer 4

both, JS, jquery and php can manipulate the DOM in HTML.
CSS modifies html,
js & jq can manipulate css and html.
html elements can trigger js and php events.
php can inject js code into the DOM
php CRUDs the database i.e. SQL