- cacographies: Internet Language
- Cài Péihuǒ 蔡培火 (1889–1983): Táiwān: Language Situation
- Cái Xīyǒng 蔡錫勇 (1847–1897): Telegraph Codes | Stenography
- Cài Yán 蔡琰: Musical Notation
- Cài Yōng 蔡邕 (132–192): Musical Notation
- Cài Yuánpéi 蔡元培 (1868–1940): Psycholinguistics, Overview
- cái 才: Counterfactuals, Concessives and Hypotheticals, Modern
- cái 才 ‘until’: Aspectual Adverbs
- Cài 蔡 clan: Chinese in the Ryūkyū Islands
- calendrical signs: Zodiac
- calendrical signs as phonograms: Pulleyblank, Edwin George (1922–2013)
- Calleri, Giuseppe Maria (a.k.a. Joseph Marie Callery, 1810–1876): Chi…