Suppose you wanted to make a Wikipedia article on a certain brand CNC milling machine, would that be useful? Not really. The only thing ever written about it is its own manual, and it doesn't feature notably with the exception of being used by some companies for manufacturing. Programming languages are the same thing. It seems rather entitled to demand Wikipedia articles for random brands of tools that don't have anything particularly significant about them.

And beyond that, it's perfectly useless. A Wikipedia article restating the information on Odin's website is a net negative information wise. You've got duplicate content for no good reason. The point of Wikipedia is to take a topic about which much has been written, and distill that into a smaller and more information dense summary. A person who finds the Odin language on Wikipedia would always be better served looking at the website instead, and thus the article is actively harmful to their understanding of the topic.