$ e哈=1 bash: e哈=1: command not found OK, but on man bash is it ever mentioned that a variable name must be all ASCII?
ENVIRONMENT
When a program is invoked it is given an array of strings called the
environment. This is a list of name-value pairs, of the form
name=value....
PARAMETERS
A parameter is an entity that stores values. It can be a name, a num‐
ber, or one of the special characters listed below under Special Param‐
eters. A variable is a parameter denoted by a name. A variable has ...
