Language change within minority languages is still an underdocumented area of sociolinguistic research. This study addresses that gap by focusing on two speech varieties within Mamaindê, an endangered language of Amazonia. First, the language ecology of Mamaindê is discussed, with attention to the vitality of the traditional language in each of its communities. The structures of the two speech varieties are then described, showing the radical difference in their inflectional morphologies. This is followed by a description of the language use patterns of each and how a former youth speech style has become the accepted language practice for all but the very elderly. leading to generational change. In the conclusion, evidence is offered that suggests this linguistic change is due to societal change, where the youth have gained status in the community and their speech has gained prestige as a result.

中文翻译：

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Mamaindê Remixed：亚马逊南部本地来源和外部动机的语言变化

少数民族语言中的语言变化仍然是社会语言学研究中一个未被充分记录的领域。这项研究通过关注亚马逊濒危语言 Mamaindê 中的两种语音变体来解决这一差距。首先，讨论了马曼德的语言生态，关注传统语言在每个社区中的活力。然后描述了两种语音变体的结构，显示了它们的屈折形态的根本差异。接下来是对每个人的语言使用模式的描述，以及以前的青年演讲风格如何成为除了非常年长者之外的所有人接受的语言实践。导致世代更替。最后，提供的证据表明这种语言变化是由于社会变化，