SALEE: Study of Applied Linguistics and English Education Vol. 3, No. 1, 2022 1 How are the Sociolinguistic Competences applied in the English Textbook? Diyah Nur Hidayati 1 1 Corresponding author, Universitas Tunas Pembangunan Surakarta, Indonesia diyah.nurhidayati@lecture.utp.ac.id Received: December 22, 2021 Accepted: January 22, 2022 Published: January 29, 2022 Abstract Promoting the sociolinguistic competences in the teaching process is vital since the students are required to use English for real-life communication. One of ways that teachers can do is by inserting sociolinguistic competences in their teaching materials. However, rarely did they focus on the sociolinguistic competences. Therefore, this content analysis research aims to void this gap by analyzing the use of sociolinguistic competences in the textbook entitled “Let’s Talk”. The result shows that the textbook has already applied the sociolinguistic competences in the dialogs including the social factors, speech functions, and Leech’s Politeness Principles (PP). To summarize, textbooks should provide more dialogue models with diverse sociolinguistic contexts for practicing interactional and transactional communication. At that time, the learners would have been exposed to learn effective language use, as well as fluency practice and language accuracy, as these are prerequisites for achieving communicative competence goals. Keywords: English textbook; politeness principles; sociolinguistic competence To cite this article: Hidayati, D. (2022). How are the Sociolinguistic Competences applied in the English Textbook?. SALEE: Study of Applied Linguistics and English Education, 3(1), 1-12. https://doi.org/10.35961/salee.v3i1.385 DOI: 10.35961/salee.v3i1.385 1. Introduction In Indonesian junior high school system, English is one of the required subjects. The aim of learning English is to help students improve communicative skill in both spoken and written forms in order to achieve functional literacy, to raise awareness of the significance of English in improving the nation's competitiveness in a global society, and to deepen students' understanding of the language-culture relationship. As a result, the use of textbook in the teaching English is critical. It is designed to facilitate students to communicate according to the context of the language use. It also enables students to access information to prepare them to achieve the goal of learning English. Additionally, the English textbook should be based on a literacy approach so that students can gain a wide range of learning experiences by taking into account factors such as