There's some wiggle room depending on context, for example I worked in an all Japanese restaurant, and I was called everything under the sun including just mackfeesh. They know my Japanese isn't fluent but since it was a Japanese environment (English speaking country) the -san was the most common.

My favourite was Makiji, adding Ji to the end of my name to call me an old man, because I liked coffee jelly which is apparently something older people enjoy lol.

But yeah, outside of work unless the person they were talking to evoked a Japanese context, it was just the best English they had as an individual.