[mapuc]

Thank you for your input.

Yes there are many dialect in a country.

I recall a situation where my father a friend and I visit some family in Germany. They had some guest who came from south Germany not so far from the border to Switzerland I didn't understand a word of what they said.

My father talked a dialect called Plattysk(Danish)-Google says Niederdeutsch(German)

I learned to talk south Scania dialect when I lived in South Sweden for some decades.

Edit
My little sister who is much better in English grammar, speaking(pronouncing) has an English dialect I call the Shakespeare dialect.
End edit

Markus