It is sometimes used to write Judeo-Tat.
It has been occasionally used by phonologists to represent a hypothetical phoneme in English, which includes both [h] and [ŋ] as its allophones. Normally /h/ and /ŋ/ are considered separate phonemes in English.
Both U+A726 Ꜧ latin capital letter heng (HTML:
Ꜧ) and U+A727 ꜧ latin small letter heng (HTML:
ꜧ) are encoded in Unicode block Latin Extended-D.
IPA usage 
A variant form, U+0267 ɧ latin small letter heng with hook (HTML:
ɧ), is encoded as part of the IPA Extensions block. It is used to represent the voiceless palatal-velar fricative in the International Phonetic Alphabet.
- Chao, Yuen Ren (1934). "The non-uniqueness of phonemic solutions of phonetic systems". Bulletin of the Institute of History and Philology, Academia Sinica 4 (4): 363–397.
- Pullum, Geoffrey K.; Ladusaw, William A. (1996). Phonetic Symbol Guide. University of Chicago Press. p. 77.
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