Forsooth, methinks the response to thine query is most evident in literature dating from the Victorian era back to the 1300s or Twelfth century. The longer the word the (usually) more formal it is. A playful child can be mischievous or capricious.
Words with formal diction include "therefore," "furthermore," "consequently," and "nevertheless." These words are commonly used in academic and professional settings to convey a sense of formality and seriousness.
formal diction is speaking or releasing words with certain enunciation.
The difference between formal and informal diction is the words that you use. Formal diction is official, business type, and appropriate wording. Informal diction is casual wording.
Diction is the choice of words chosen by the speaker or poet. The words may be long and formal, or short and easy to understand. Either way, diction has a great effect on the poem.
A formal example of diction would be "The board of directors convened to deliberate on the strategic plan for the upcoming fiscal year."
There so many phrases that has the least formal diction. For instance the phrase kick back has an informal diction which makes is least formal type of diction.
Formal
formal, informal, and, normal
objectivity for apex
Diction Apex ;)
To kick back
Use scholarly but simple diction and avoid using contractions like can't, don't, and isn't.
Millers diction is formal, yet simple and easy to understand. His language is plain and concise.