>>6 Tim-Tam I believe
>>5 Karasu is likely talking about regional dialects/accents,
just like in most countries round the world have regional dialects/accents, just like in England we have a fair few of them, wiki link for just England -
https://en.wikipedia.org/wiki/List_of_dialects_of_the_English_language
Here one for Japan -
https://en.wikipedia.org/wiki/Japanese_dialects
But be honest the OP dose not really have to worry about that too much. :D