The study investigates the attitudes of teachers of English language at secondary schools in Sheikan locality towards the British or American English in the Sudanese syllabus. The study aimed at tracing the phonological and structural differences between the two varieties to support language perfection. It also aimed to find out whether these varieties are reflected in the Sudanese syllabus. The study hypothesized that mixing American and British English in educational institutions hinders developing a linguistic competence. The study has been conducted during (2022 – 2024) in University of Kordofan. The descriptive Analytical approach has been followed, for the data collection and analysis; the tool was a questionnaire. The sample of the study was (30 out of 120) English language teachers and university professors. For the validity and reliability, Pearson (r) and the standard deviation were used. Varieties of English occur in the Sudanese syllable because English is spoken in different parts of the world differently, all respondents agreed, the main varieties of English language in the Sudanese syllable are British and American70.00% of respondents agreed,30.00% were disagreed.86.70% of respondents agreed that the Received Pronunciation (RP) is suitable for the comparison between varieties of spoken English Worldwide, 10.00% were disagreed, and 03.30% were not sure. 33.3% were agreed that mixture of British English and American English threatens English Language Learning, 53.40% were disagreed and 13.30% were not sure.56.70% of respondents were agreed that confusion and misunderstanding is created due to the use of British English and American English, 40.00% were disagreed and 03.30% were not sure. The Study recommended; native speakers are important in the field of teaching English. Teachers and learners should trace one English variety in the same context. Teachers should be trained to strict on one variety of English. Courses, seminars and workshops in the varieties of English for English language teachers’ good opportunity to refresh the linguistic knowledge.