C is a perfect language for writing games into; C++ has some extra sauce that makes some things easier, faster to write and more correct. There is no actual need for a new language for writing games; that's why so many, including the author, give up. C/C++ has the 90% of what is needed to write any application, and the rest 10% is simply elusive and might not even exist.
Problem with C/C++ is maintaining and writing code. I am sure you are well aware of Jonathan Blow's efforts in writing Jai programming language. If not take a look at his Youtube channel. Pretty eye opening. (I am no game dev btw)
I am a beyond-veteran C/C++ programmer, I already have studied Jai, viewed all of Blow's videos etc.
I will not recommend Jai for any development, it doesn't offer anything substantially better than the current C/C++ combo to justify the switch.