Code in Roblox is written in a language called Lua and is stored and run from scripts. You can put scripts anywhere — if you put a script in a part, Roblox will run the code in the script when the part is loaded into the game.

Does Roblox use C++?

Yes. The Roblox scripting language is a mixture of C++ and Lua, so you would ideally want some sort of familiarity with either of both of these programming languages to create a game for Roblox.

Does Roblox use Java or Python?

Roblox uses Lua code. Roblox is coded with Lua, and uses relatively simple and use kid-friendly conventions so they can quickly get to grips with how to program inside the Roblox platform.