This forum is for C++ programming discussion/questions, and while you may certainly use C++ in your quest, this post doesn't seem to be asking anything on topic. Perhaps you could be more specific in your question.
Write your own programming language and call it tree.
Sorry this is not the place to ask questions like that, this place is mainly for C++ and as Cire siad you might use it but you arent asking for anything specific and we cant really help you
If you are new to programming I'd suggest learning to program before creating a language. Secondly you will probably want to learn Assembly Language as this is the closest you can get to the hardware. Thirdly you need to understand the hardware on an intimate level.
That's a great idea, writing your own language is a great task. I would say start of learning the basic languages like C/C++, Java, Matlab, and etc so that you can model your langauge after these codes.