- Thai language--Orthography and spelling (13)
- Thai language--Grammar (3)
- Hiumœ̄rit--Criticism and interpretation (1)
- Lao language--Orthography and spelling (1)
- Thai language--Dictionaries (1)
- Thai language--Homonyms (1)
- Thai language--Orthography and spelling--Dictionaries (1)
- Thai language--Usage (1)
- Thai language--Versification (1)
- Thai language--Writing (1)