Morse code is not a language, its a code for translating letters into sounds. You can use it to transmit txt spk as long as the person on the other end can understand it.
Computer languages are used to help us communicate with computers as we find it quite difficult to write in machine code directly. The panecea of computing was whilst I was studying computing a machine that understands English directly, we are getting nearer but we are still not there yet. However, computer languages are not true language but rather another code.
As for merit in inaccuracy, how about the Jaberwocky or other Lewis Carroll works, Rabbie Burns and surrealist painting? Fortunately, engineers don't control the artworld otherwise this would be a very dull place.
Your GPO films, they must have all been shot in the home counties then. I can tell you ordinary people have never used proper English in Central London, Liverpool, Birmingham, Newcastle, Sunderland, Aberdeen, Cardiff, Leeds .... Etc.
My view is that people now spend more time communicating than ever before and as a result are less hung up on the odd mistake. Personally, I value the message and I want to hear what people have to say ahead of their grammatical abilities.
If these off topic posts are going to be a problem could a friendly moderator move these posts into a thread on their own? Thanks.