My Japanese

I had a cup of tea with my three Japanese friends and one British friend. The British friend asked us “What do you call salmon in Japanese?”
I answered “しゃけ syake”. Then one of my Japanese friends told me, “Eriko-san Syake is Kansai-ben.”

Eeeee?? I always called “salmon as しゃけ” in Japan. In standard Japanese it should be called “さけ sake”. In my excuse I’ve never lived outside of Kansai area in Japan. I did my best to speak standard Japanese in Manchester however all Japanese friends noticed I’m from Osaka. I need to learn standard Japanese.