This study focuses on the analysis of linguistic and extralinguistic factors influencing the phonological variation of vowel nasalization in the speech of bilingual speakers of Uruguayan Portuguese (UP). The setting is the city of Rivera located along the Uruguayan-Brazilian borderline. The data were collected in participant-observation and sociolinguistic interviews with fifty-four local UP speakers. Data results show that vowel nasalization is a linguistic variable constrained mainly by morphophonological and sociophonetic factors. Phonological processes interact with affixation in inflectional and derivational morphology in the process of vowel nasalization. Results show that functional category of the word and preceding phonological environment play a significant role in the distribution of nasal variation in contemporary UP in Rivera.

中文翻译：

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声音变化的社会语言演变

这项研究的重点是，在使用乌拉圭葡萄牙语（UP）的双语者的语音中，分析影响元音鼻音化语音变化的语言和语言外因素。地点是里维拉市，位于乌拉圭与巴西的交界处。数据是在与54位当地UP演讲者进行的参与者观察和社会语言访谈中收集的。数据结果表明，元音鼻音化是一种语言变量，主要受语素和社会语音因素的制约。在元音鼻音化过程中，变音和变位形态中的语音过程与固定相互作用。结果表明，该词的功能类别和先前的语音环境在里维拉当代UP的鼻音变化分布中起着重要作用。