> Language is the serialization format for abstract concepts.

For you maybe, but some people work with images only and most people use a mix of language and images. Autistic people tend to work exclusively with images, or exclusively with words. Some also use music or numbers. You don't need to speak any audible language to invent or understand things. Your own internal language is enough. You'll just be so isolated that you're unlikely to be understood by the masses, that's all.