- X-bar theory, psycholinguistics: Psycholinguistics, Overview
- Xī Kāng 嵇康 (223–262): Musical Notation
- Xī’ān 西安: Dialect Classification | Dialects, Premodern | Mandarin, Varieties of | Reconstruction, Methodology
- Xī’ān 西安, phonology, history: Historical Phonology
- Xiá lù féng 狹路逢 (Perilous encounter: Godspeed to a deadly voyage): Chinese in Nagasaki | Chinese in the Ryūkyū Islands
- Xià Sǒng 夏竦 (985–1051): Paleography
- Xiàmén 廈門, contractions: Contraction
- Xiàmén 廈門, migration to Australia: Chinese in Australia
- Xiàmén 廈門, tone: Tone, Music and Singing
- Xiàmén 廈門, tone sandhi: Tone …