Certainly. There are plenty of examples of this sort of thing, but the one that I think of first is Latin clitics, such as -que "and". Take populus /ˈpopulus/. It has initial stress, but when -que is added (as in Senātus Populusque Rōmānus) it becomes populusque /popuˈluskʷe/, with stress moving two syllables over. Like with your conlang, that's a regular consequence of stress assignment.
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It's completely naturalistic. Dormouse points out a straightforward example with Latin, where it's just a stress shift; at the other end of the continuum, into the realms of nightmare, there's Old Irish, in which negating a verb effectively requires a completely different verb root, thanks to the massive loss of unstressed vowels and all that that results in (including vowel changes and palatalisation)aliensdrinktea wrote: ↑14 Oct 2020 03:14 I don't mean to interrupt, but I just realized the definite affix in Yuraalian is a heavy syllable, and because it affixes onto nouns, it affects stress placement in certain words (and vowel quality in turn). For example:
jalun [ˈʑɒln̩] '(a) road'
ol-jalun [ˈolʑəˌlun] 'the road'
Is this naturalistic? Or should I fix it somehow?
Wikipedia gives examples like:
do⋅berat (they bring), vs ní-taibret (they don't bring)
as⋅bó (he may refuse), vs ní⋅op (he may not refuse)
imm⋅soí (he turns around), vs ní-impaí (he doesn't turn around)
do⋅róscai (he surpasses), vs ní-derscaigi (he doesn't surpass)
In between these extremes, there's a big, fun area with noticeable but understandable ablaut effects.
However, I would say that extreme systems like Old Irish's probably aren't very sustainable: speakers will get confused, new speakers will struggle to learn the language, and over time one form or the other is likely to be chosen. The more extreme the variation, the more likely it is to collapse. More moderate forms, however, can last a very long time, particularly if they're very systematic, or if they become limited to only a subset of more common words - look at English 'irregular' verbs! [which ultimately (probably) result from this sort of stress shift, only caused by a suffix rather than a prefix - which in turn triggered vowel changes]
Fascinating, and nightmarish indeed! Thank you for sharing!