This study aims to determine the level of use of spelling, effective sentences, and Indonesian language paragraphs in scientific papers applied by undergraduate students of the State Polytechnic of Bali in the form of theses. This research is important because there is a tendency to use spelling, effective sentences, and paragraphs in student scientific papers that are not in accordance with applicable rules such as prepositions, punctuation. The method used in this study is a qualitative method, while the method of data collection in the form of documentation with qualitative descriptive analysis. Studies on spelling order, each of them scored: