The merger of post-alveolar /ʃ/ and palatal /ç/ into alveolopalatal /ɕ/ has recently gained growing interest in sociophonetic research, especially in the Middle German dialect area. In Luxembourgish, a Continental West Germanic language, the sound change has been linked to age differences, while its origins remain unclear. Two studies with a regional focus are presented in this paper. The first study examines the merger in the Centre and the South of Luxembourg. The acoustic examination of both the spectral peak and the centre of gravity of a spoken data set of five minimal pairs embedded in read and orally translated sentences from 48 speakers (three generations (old generation, 65–91 years; middle generation, 40–64 years; young generation, 20–39 years; each generation, n = 16), men and women) reveals interesting results related to their regional background. In the old generation, the merger is further advanced in the speech of old men from the former mining region in the South compared to their peers in the Centre, the former leading this sound change. On the other hand, young speakers in both regions produce only alveolopalatal /ɕ/, the merger being complete in this generation. The second study presents exploratory data from the East and the North of the country. The analysis of this smaller sample (n = 6 speakers) reveals patterns similar to the central region. Pointing to language contact with Romance in the South as cradle and/or catalyser of the merger, these results not only give further clues as to the development in Luxembourg, but also add to a deeper understanding of sound changes in process in complex sibilant systems.

后齿龈音 /ʃ/ 和腭音 /ç/ 合并为齿龈腭音 /ɕ/ 最近引起了社会语音学研究的越来越多的兴趣，尤其是在中古德语方言区。在西日耳曼语系的卢森堡语中，声音变化与年龄差异有关，但其起源尚不清楚。本文介绍了两项以区域为重点的研究。第一项研究考察了卢森堡中部和南部的合并。语音数据集的频谱峰值和重心的声学检查，该数据集包含 5 个最小对，嵌入阅读和口译的句子中，来自 48 个说话者（三代（老一代，65-91 岁；中一代，40-64 岁）年；年轻一代，20-39 岁；每一代，n = 16），男性和女性）揭示了与其区域背景相关的有趣结果。在老一代中，南部前矿区老人的讲话中，与中心的同龄人相比，合并进一步推进，前者引领了这一声音变化。另一方面，这两个地区的年轻说话者只产生齿龈腭音 /ɕ/，这一代的合并已经完成。第二项研究提供了来自该国东部和北部的探索性数据。对这个较小样本（n = 6 个说话者）的分析揭示了与中心区域相似的模式。指出与南方罗曼语的语言接触是合并的摇篮和/或催化剂，这些结果不仅为卢森堡的发展提供了进一步的线索，