Communication takes many forms. Not just in the different tongues we use, but also in the accents we apply when we open our mouths. Different communities may agree to pronounce things in a manner that may sound natural to them, but peculiar to others. In fact, that’s how many of the existing languages formed over the millennia.
In the late 1800s, George Bernard Shaw made an interesting remark in a music review that looked at the disparate sounds produced by orchestras in Manchester and Lancashire.