This study explores the representation of Indonesian culture in the English
textbook “Bahasa Inggris: Train of Thoughts” for 12th-grade senior high school
students, published by the Ministry of Education and Culture under the Kurikulum
Merdeka. Employing a qualitative content analysis method and Yuen’s (2011)
cultural dimensions framework comprising products, practices, perspectives, and
persons this research examines the extent to which Indonesian cultural elements are
integrated into the textbook’s written and visual materials. The findings indicate that
only the products dimension is consistently represented, particularly through
depictions of traditional artifacts, natural heritage sites, and cultural landmarks.
Meanwhile, the other three dimensions (practices, perspectives, and persons) are
absent, revealing an imbalance in cultural representation. This limited portrayal
suggests that while the textbook promotes some cultural awareness, it falls short of
offering a comprehensive view of Indonesian culture. The study highlights the need
for textbook developers and educators to incorporate more diverse cultural content,
ensuring that students not only develop language proficiency but also deepen their
understanding of their own cultural identity through English language learning.