Dialectal omission of letter sounds is indicated by using?

Dialectal omission of letter sounds is indicated by using an apostrophe (') in the written form.

Here are some examples:

* "I'm" instead of "I am"

* "Don't" instead of "do not"

* "Can't" instead of "cannot"

* "Y'all" instead of "you all"

This is a common practice in linguistics to represent the way words are actually spoken in a particular dialect, even if they are spelled differently in standard written English.