Since Sage now supports Python 3, the possibility of using tildes and other unicode letters in names of variables is real. For example, I could define a constant Gauß instead of Gauss (with a "ß" instead of "ss"); or I could define a function called Müller (with two dots over the "u"). In Spanish and other languages, this is a more pressing matter. If I defined a function design(howMany), in Spanish it would be diseño(cuántos).