No, Apple is not intentionally wasting your storage. That's frankly a very offensive accusation to make.
As for alternate language content, honestly that stuff doesn't take up very much space, and stripping it would break the code signature. The only way Apple could strip that is if they perform the equivalent of App Thinning based on a list of languages you specify when downloading the binary from the App Store (and even that wouldn't apply to downloading non-MAS apps).
As for alternate language content, honestly that stuff doesn't take up very much space, and stripping it would break the code signature. The only way Apple could strip that is if they perform the equivalent of App Thinning based on a list of languages you specify when downloading the binary from the App Store (and even that wouldn't apply to downloading non-MAS apps).