If the basis is set as a simple and clear shape for a rational definition or a function, it can be used forever. I love NY'. Symbolic characters work immediately like traffic signs. It is not necessary to recall the vocal words each time to get the meaning from the writings. Visual symbols can be used with each own vocal language Now mathematical notations are widely common.
Nobody thinks that they are using a foreign language with mathematical notations.
A visual basis is like a mathematical sign. So if the symbols are user-friendly enough, EL can be like anyone's own native language not a foreign one. In this way, the new common language can not destroy minority languages with its spreading. Various applicable methods of the visual basis When the shape of a basis is simple, it is easy to show it as the hand shape or the hand movement. One can see the relation between the character and the hand sign without much effort.