Dialectal omission of letter sounds is indicated by using a?

Dialectal omission of letter sounds is indicated by using an apostrophe (').

For example:

* "I'm" for "I am"

* "Can't" for "cannot"

* "Don't" for "do not"

* "Gonna" for "going to"

This is a common way to represent dialectal variations in writing, showing where sounds are left out or altered.