The original Unicode charts showed the hook on the left, while most use in Africa had it on the right, as reflected in the 1978 African reference alphabet. The Unicode usage apparently followed that shown in ISO 6438, but it is not clear where the latter got it. The form used in the code charts was later changed to show the hook on the right side.[2][3]
Alternative representations
An alternative representation of the sound is ʼy. This is used in the orthographies of Hausa and Fula in Nigeria, while ƴ is used in Niger for Hausa, and in most of West Africa for Fula. See also: Pan-Nigerian alphabet