Some E speakers will partially nasalize
vowels, either as part of their regular speech habits, or alternate a nasal allophone in some environments with an oral one in others.
Its effects are usually progressive (that is, they affect following vowels) but regressive nasal spread also occurs (whereby a nasal consonant nasalizes
a preceding vowel, as in French words).
We've lived in Berkeley now all our grown-up lives, but she still nasalizes
her 'i's and 'a's like a refugee from Lake Wobegon.
If, in fact, voiced oral stops in the syllable onset are nasalized by a following nasal vowel, we would expect that the same rule nasalizes
segments that are less sonorous than voiced stops.
These processes are: first non-contiguous assimilation ('la dilation'), whereby the nasality of the vowel in the second syllable spreads to affect the vowel of the first syllable (so Osain becomes Onzain); secondly, spontaneous nasalization, whereby an oral vowel nasalizes
without the trigger of a nasal consonant in the etymology of the word (so Buncey arises from something like Bucey).
lt;u> = [y] <u> = [c] in <-um> <qu-> + e,i = [kp] <ae>, <oe> = [e] <au> = [o] <ei> = [e:j] <eu> = [o] <ui> = [hi] <c>, <sc> = [s], except before consonant, or <a>, <o>, <u> <g> = , except before consonant, or <a>, <o>, <u> <ti> + vowel = [s], except in <-sti->, <-xti->, <-tti-> <j> =  <m>, <n> = [m], [n], but also nasalizes
previous vowel (except <-mm->, <-nn->) <z> = [z] <h> = silent, all environments TABLE 3.