Clarify that namespaces should be utilised in C++

specification.md

@@ -296,6 +296,10 @@ The compiler guarantees the following:
 - Functions do not interact directly with `stdin`, `stdout`, or `stderr`.
 - No function terminates the application on correct usage.
 
+*Note for C++*:
+Do not prefix symbols.
+Put everything in an `mcc` namespace instead.
+
 ### Logging
 
 Logging infrastructure may be present; however, all log output is disabled by default.