From a quick look it doesn't seem that the graphical elements are inherent to the language. It could be expressed in a text syntax, and with more or less difficultly other languages could get a similar graphical overlay.

If the graphics are useful training wheels to new programmers of scratch, the same is probably true for the text languages. And from time to time even a super cyclist can find a use for training wheels.

For one thing, a language expressed in a common graphical form could help communicate with non-coder domain experts, quality assurance teams, customers, etc. This is kind of an argument to publish the latin bible in the vulgar argot, less exclusive to the priesthood.