Huayiyiyu

The Huáyí yìyǔ () refers to a series of vocabularies produced by Ming and Qing dynasty Chinese administration for the study of foreign languages. They are a precious source of phonological information, both for the study of Chinese pronunciation and for the study of the languages in question.
Categorization.
The relevant works of the huáyí yìyǔ fall into four categories: A Sino-Mongolian vocabulary compiled by Huo Yuanjie (火源潔), 2. Vocabularies that were compiled and re-edited in the Siyiguan (四夷館). 3. Vocabularies prepared by the Huitongguan (會同館). 4. Qing dynasty vocabularies.
The languages covered by works in the second class include 韃靼 Mongolian, 女直 Jurchen, 西番 “Western Barbarians” = Tibetans of the Kham region), 3 西天 languages of India, 4. 回回 Persian, 5. 高昌 Uighur, 6. 百夷 Daic languages, 7. 緬甸 Burmese, (8) 八百 Babai (Lanna), and (9) 暹羅 Siam. Tatsuo Nishida published a book studying each, the Tibetan, Burmese, Tosu and Lolo languages as recorded in the Hua-yi yiu.
The languages covered by works in the third class cover (1) 朝鮮 Korea, (2) 琉球 the Ryukyus, (3) 日本 Japan, (4) 安南North Vietnam (5) 暹羅 Thailand, (6) 韃靼 the Eastern Mongols), (7) 畏兀兒/委兀兒 Uighurs, (8) 滿剌加 Malacca, (9) 占城Champa = South Vietnam, (10) 西番 “Western Barbarians” = Tibetans of the Kham region, (11) 回回 Persians), (12) 女直Jurchen, and (13) 百夷 Baiyi.