Abstract: Dialectal variation has witnessed a noticeable progress in the past half –century, this progression lead to consider the dialectal variation as a very important aspect of research in sociolinguistics. This study concentrate on dialect and language in general, it also explains the differences between standard language and dialect, and it shows how a particular dialect is used in a specific region and it is considered as an identity as well, it aimed to show how dialect’s groups of one language may be considered mutual intelligibility or non-mutual intelligibility, and this classification is based on the percentage of convergence and divergence among them.