i understand what you mean but when considering Yoruba you have to understand that in the areas where this language does thrive, Aeronautics and the like aren't important parts of the local society. And also more importantly, a Yoruba degree in Aeronautics would mean you can only work in Southwestern Nigeria and Southeastern Benin. That's it. Whereas in Italy, you can work in the ENTIRE country with a degree like that. The language hasn't developed on those terms because it's highly unnecessary. That's like finding a Yoruba word for snow or icicles. It doesn't make the language less developed.