C++ extensions

If

Cpp has very complex and unoptimized syntax by design, so the baseline time to compile is pretty high. Other languages with well thought-out syntaxes (go, zig, odin, even C itself) compile much faster.

and

A include is nothing more than a copy and paste

can I just use a fast compiling and less verbose language by default and use C++ extensions like it was Groovy for Java?