To make English unintelligible to the English, add a Scottish, Geordie or American accent!
Sometimes I wonder what other people here sound like, what their accents are, and how a face-to-face conversation with them would be. I grew up in Sweden, and when we learned English in school we early on had to choose whether we were going to use British English or American English. I chose British English since it seemed more applicable, and I spoke that way well into my 20s. At age 26 I began speaking to more Americans, and just drifted into an American accent, which is easier to do while being a Minnesota resident.
If I could do it all over again, I'd like to have a Scottish accent. A mild one... It's music to my ears.
"Often moments come looking for us". - Robert Frank
"Make good art!" - Neil Gaiman
"...the heart and mind are the true lens of the camera". - Yousuf Karsh
Some friends of my youngest son who are from Newcastle who have very strong regional accents, who I admit have some trouble understanding most of the time are a rock band who recently were touring the U.S. and they had great difficulty making themselves understood, and had to write things down to do so, they said they felt like Martians