The lahjah (dialect) refers to a particular way of using language within a specific environment in a community. It encompasses the speech habits of a group of people who speak the same language. These speech habits are often phonetic, meaning they affect how words are pronounced or formed. Examples of old Arabic dialects include ‘an‘anah (changing the initial “hamzah” sound to an “ayn”), kashkashah (adding “sh” after the “k” sound when addressing the feminine), and ‘aj‘ajah (transforming a double “ya” into a “jim” sound). These phenomena are still present in many Arabic dialects across the Arab world.

Phonetic differences play a significant role in distinguishing and diversifying dialects. A dialect is essentially a variation of language, occurring on the phonetic or expressive level. Scholars generally agree that a dialect is a communicative system no different from a language. Scientifically, a dialect is defined as “a set of linguistic features specific to a particular environment, shared by individuals of that community.” The environment of a dialect is part of a broader language environment.
The distinction between language and dialect is difficult to pinpoint. The relationship between them is closely intertwined and often dependent on social, economic, or religious factors—or the lack thereof. The way a community speaks reflects not only its linguistic history but also its cultural and social context.