No offence but literally everyone can design a language without bothering to implement it - in fact I am pretty sure that most programmers have done something like that at some point of their journey. I would suggest to post about it again once you have completed its implementation as well as share your experiences on it. If you have not implemented a language before I would suggest that you start with something simpler, such as a stack-based language or a lisp instead and ignore more complex features like exceptions or classes.

As for the language itself, is there any reason why would you want booleans to be primitives? I would suggest to investigate something like haskell's ADTs and move them to the standard library.