Some corrections: Boost.Python (note the period) was a C++ library for automaticing the generation of cross-language bindings between Python and C++. It wasn't itself a distribution of Python. Boost.Python still exists. However, its successor (pybind11) used features shipped in C++11 to simplify the implementation (and compiles far faster) and is the leading Python-to-C++ binding to use today. I'm using pybind11 in a project today with bog standard Python3 and it works great.

Lua made inroads into the game dev community in particular thanks to LuaJIT. Despite it actually being a fork of Lua that hasn't kept up with changes in the base language, LuaJIT remains popular for its speed.