It had a lot of advantages. A big one being the extremely small number of people who spoke it and who lived exclusively in North America. They could also have

It had a lot of advantages. A big one being the extremely small number of people who spoke it and who lived exclusively in North America. They could also have “fun” and make it very hard to crack. For example they could call a submarine a “metal fish” one day and a “sea snake” the next day and leave everybody scratching their heads. As a native speaker they could use subtle context to convey the message and that turns out to be extremely difficult for an outsider to grasp.