Dialect dream meaning is explained below using 2 different sources. Each interpretation is shown with its source.

Interpretation 1 — Martha Clarke

If you are among people who speak a strange dialect, this dream indicates the need to feel accepted in a group that you do not belong to. Indicates isolation and loneliness. If, however, you are able to speak a language other than your native, it is interpreted as a sense of security. You are prepared to face new situations.
Source: The Big Dictionary of Dreams Author: Martha Clarke

Interpretation 2 — Klaus Vollmar

If it is the dreamer’s own dialect, this image points to identity or psychological rigidity.

If it is a foreign dialect, it points to a side of the dreamer that is unknown to him.

The connections the dreamer can make to the dialect are important.

Source: Little Giant Encyclopedia Author: Klaus Vollmar