The best words in investigating the mistakes of the common people

All colloquial words are not a melody in it !! Is this a true claim? The language has entered a lot of melody, colloquial and intruder, and many linguists have tackled this issue and showed the user''s error and the correctness in which the use is made and put in that literature and among them was this author, which contains 223 words and the public mistake, and pointed to its right. On what was written in this field first and dictionaries second.