I'm Canadian and the weirdest encounter of English speaking accents I ever heard was in the south of Germany. We were in a rental car and just exploring the country and getting hopelessly lost. We were in the south near Nuremberg and we stopped at a gas station. A young man came up to us to operate the pump. He spoke German at first but then realized we were English speaking so he changed languages.
It was the weirdest form of English accent ... it was English with a strong German accent mixed with a heavy southern American country twang. He even asked "How y'all doin?" in that weird accent of his.
We asked him about the accent and he said he had learned his English from an American military base nearby that had a lot of people from the American south, especially Texas.