The term Barbarism is applied to unauthorized language. Some offenses against good usage are the following:
1. Obsolete words, words gone out of use.
2. Provincialisms, words peculiar to some locality.
3. Colloquialisms, words peculiar to familiar conversation.
4. Solecisms, ungrammatical expressions.
5. Archaisms, expressions which would be obsolete except for their occasional use in poetry.
The term Impropriety is used to designate reputable words misapplied.
Slang is a general name for current, vulgar, unauthorized language. It may take the form of barbarism or impropriety.
Use the fewest and simplest words that the subject will bear.
Specific words are usually more forcible than general terms.