Curious. Are there examples of programming languages that allow spaces in identifiers? Obviously, it would need to be designed for that.<p>I&#x27;m against the case-sensitive nature of some programming languages, and file systems for that matter. While it makes sense in a computing context (faster), you invent a new mode, just for the computer..<p>(Fortran was probably case-insensitive because upper-case letters were used first, and when lower-case letters were introduced, care was taken to neatly map them into the character set bit-wise, so one could simply clear the sixth binary digit to turn a lower-case letter into its upper-case equivalent, then continue the string comparison.)<p>Of course, with Unicode, you need a more complicated check, or you could just ignore Unicode in the language itself for identifiers, yet allow it in literals, data types, etc.