This study aims to classify several errors that often occur among students of UIN Raden Mas Said Surakarta majoring in Arabic Language Education for the Academic Year 2022/2023. Through several methods that can be used to classify errors in daily conversation using Arabic, and also examine the factors that cause these errors. Some students need improvement in their language, including grammatical errors (shorof), grammatical errors (nahwu), and the most popular is the transliteration error from Indonesian to Arabic, or what we often hear with the term "Mengarabkan Bahasa Indonesia". The most popular grammatical error (shorof) is in the error of changing from fi'il madhi naqis to its fi'il mudhor form, in the most popular grammatical error is the error in the placement structure of na'at man'ut and mudhof mudhof ilaih, and in the most popular transliteration errors are errors in the use of language and regional games are made into Arabic, for example, "لا الى اللبن" which initially means don't rush, but made by speaker using the Arabic language.
