e-mail: teknosastik@teknokrat.ac.id TEKNOSASTIK ISSN 2656-6842 Volume 19 (1), 2021 Pratiwi, Indrayani 24 Pronunciation Error on English Diphthongs Made by EFL Students Desy Riana Pratiwi 1 , Lia Maulia Indrayani 2 desyrianapratiwi@yahoo.co.id 1 , lia.maulia@unpad.ac.id 2 Universitas Padjadjaran Abstract This research addresses pronunciation errors of English diphthongs made by EFL students. The data were collected from pronunciation recordings of 9 post-graduate students who were studying linguistics in the second year. Three of the respondents were male and 6 female students. Studies show that different backgrounds and cultures affect sounds and sound styles as they are related to pronunciation or language styles. The purpose of this research was to analyze and describe the pronunciation errors of English diphthongs made by EFL students. Diphthong is divided into two types, namely GA (General American) and SSBE (Standard Southern British English) or commonly referred to as British accent. To collect the data, the researchers recorded students’ pronunciations using a smartphone. The data collected were then analyzed by employing qualitative and quantitative descriptive methods. The results show that 4 students used SSBE diphthong accent and 5 used GA diphthong accents. In this analysis, there were also 4 students who made pronunciation errors in pronouncing [eɪ], [ɛə], [ʊə] and [aɪ] diphthongs, 3 students had problems about [aʊ] and 2 students mispronounced [oʊ] diphthong. Keywords: Diphthongs, phonetics, pronunciation, vowels Introduction Language is often used as means of communication. The function of language is to convey messages in the form of sound or written form. It can be said that language is the source of all human sound systems, words and expressions. Phonology is the study of sound, how sound is regulated and used in natural languages, while phonetics is the study of all human voices to produce sounds, the focus is on human speech rather than focusing on a particular language. According to Hakim (2012) good pronunciation is a crucial thing. In learning English language, there are four skills that should be learned: reading, writing, listening and speaking. Through this analysis, the writer aims to analyze the pronunciation errors of English diphthongs in order to avoid the errors in the future. In this analysis, the writers conducted a study about pronunciation errors of diphthongs by EFL students in the third semester. Diphthongs are divided into two types, these are GA (General American) and SSBE (Standard Southern British English) which can be referred to as British accents. To collect the data, the writers asked the students to read a list of words and record their pronunciations by using a smartphone. The writers then transcribed the sounds produced by the students by note-taking methods. After the analysis is completed, the diphthongs produced by the students seem pronounced correctly. However, if they are analyzed more deeply, there will be differences. By conducting this study, the writers expect that the result of this study will provide knowledge in phonetics and phonology, particularly related to the production of diphthongs. The main reason of conducting the study is because there are still pronunciation errors made by the students in producing diphthongs. However, there are a few people who are concerned about this issue. The writers think that this problem need to be fixed because the