My toy programming language uses “ and ” for string literals. It counts nesting, so you can write “Don’t say “Hello””. There is no escaping. In fact, you can quote any piece of code by simply enclosing it in “ and ”. Code is commented out by turning it into an unused string literal.
I can't personally imagine this solution would be any less confusing, given that the new preferred apostrophe character according to this source is specifically a right single quote character.
