That is ‘dialect’!
Explanation: Dialectic is slang used in cultures. Think “wanker” used in Brit slang.
Vernacular is the language that belongs to said place. So “French is Paris’ vernacular” or “English is americas’ vernacular.”
I cannot justify tone or disposition. Disposition is a habitual tendency or personality so I don’t see how that fits.. same with tone.
Hope I helped!
Answer:
the value of book lesrning