1. This should exclude the rare cases of “spontaneous nasalization” which can be found in English and Japanese. 2. Campbell (1980: 21) mentions Proto-Algonquian [*a] changing to a nasal vowel in Eastern Algonquian, due to contact with Iroquoian languages. He does not consider this a true counterexample, however, because this exception has an external origin, from areal diffusion, not intrinsic value. The same issue is briefly discussed in Sherzer 1972: 267-268.
1. For a similar generalization about the formation of nasal vowels, cf. ##943, 944.2. Ferguson further specifies the “conventional” origin of a nasal vowel as the loss of a following nasal stop (1974: 11).
1. For a similar generalization about the formation of nasal vowels, cf. ##943, 944.2. Ferguson further specifies the “conventional” origin of a nasal vowel as the loss of a following nasal stop (1974: 11).