This study aimed to investigate the types of English loan words do Thai students use the most in Thai subjects related to transliteration, loan blend, loan translation and loan shifts. The participants were 451 students (Grade 7, 8 and 11) at Wat Phrasrimahadhat Secondary Demonstration School, Phranakhon Rajabhat University, Thailand in the 1st academic year 2023 who studied Thai subjects; Intensive Thai I, Intensive Thai III, and Contemporary Literature. To collect the data of the study, the researchers set up the reading and writing activities which were revised according to some advice from the three experts to investigate the types of English loan words. An activity record sheet was created and required to identify types of English loan words after classes which consisted of two categories: types of loan words and examples. The finding revealed that transliteration was used most (142 words or 81.60%) following with loan blend (32 words or 18.40%), while loan translation and loan shift were not found.
Keywords: English loan words, Thai junior and senior high school students, Thai subjects
