Research report is Inferiority English. Objective to study the cause of most mild English language and compare causes mild of English with scholars who says about this. To bring the solution to the inferior English to trial see which method best results. Causes is there a way to mild English language performed by the students upper high school students in Theerakarnbanhong school 547 people, teachers in Theerakarnbanhong school 64 people, teachers in Huaha school 10 people , teachers in Doidan School 10 people and teachers in Nongplasawai school 20 people fill out a questionnaire about the causes mild English language and found analysis average and percentages then compared to the scholars who says about this.