Newbie doubt (Lua & plugins)

[Ts-pe]

I've been searching for a while, and I have a doubt, is Lua is a plugin by itself, or is it considered a separate development language.

This is because I can't find a way to connect lua and other plugins (Live2d, effeseek, fairygui, spine, etc), which are easily accessible from c++ (instead of lua l2d.Model:create(...), fgui.GComponent:create(...), sp.SkeletonAnimation:create(...) statements), the demos are all in C++ but not in lua, there is no information or guides on how to add the implementation (beyond guides to add lua bindings in cocos2d using tolua), there is also the doubt because I read that they were going to change the tool from tolua to sol2.