The use of slang creates which type of communication barrier?
Language barriers and unclear words.
Slang is the language that is used by a specific group of people that illustrates their individual identity and attaches personal context that only the ones that belong to that group understand.
If a person uses slang with someone from a different culture or groups and is not acquainted with any of the words, there can be miscommunication between the two speakers.
Formal language can help the speakers understand each other and share the desired message in a successful manner.