These are sometimes given the eye dialect spellings yer and me.
From the en.wikipedia.org
Eye dialect as a literary device.
From the en.wikipedia.org
The name is spelt with a j as a form of eye dialect because traditional Andalusian pronunciation has retained an aspirated h lost in other forms of Spanish.
From the en.wikipedia.org
Ben Affleck's The Town is the work of a filmmaker with an eye for faces, an ear for dialect and a light hand on the editor's shoulder.