Writing on social media often departs from prescriptive norms through the use of non-standard words, spellings and punctuation. Amongst these traits is the repetition of letters (e.g. <ouiiiii> for oui ‘yes’). In this study, we draw upon a corpus of over 65 million tweets from three dialects of French (Laurentian, Metropolitan and Midi) to test phonological motivations for the choice of repeated letter in a word with repetition. Using mixed-effects multinomial regression, we compare dialectal differences in whether repetition targets final consonants (silent or pronounced), word-final orthographic <e> corresponding to phonological schwa, and prosodically accented penults. We demonstrate that repetition covertly signals phonological properties. We conclude that prosody mediates morphological and phonological effects and that grapheme-to-phoneme correspondences vary between regions, thereby producing phonological patterns that writers likely did not intend to convey at the time of writing. We also propose that orthographic repetition on Twitter has two prosodic sources: the default pitch accent in French (shifted or not) and focus.

社交媒体上的写作经常因使用非标准的单词、拼写和标点符号而背离规范规范。这些特征中包括字母的重复（例如 <ouiiii> 代表 oui 'yes'）。在这项研究中，我们利用来自法语三种方言（Laurentian、Metropolitan 和 Midi）的超过 6500 万条推文的语料库来测试选择重复单词中重复字母的语音动机。使用混合效应多项式回归，我们比较了方言在重复是否针对最终辅音（无声或发音）、对应于语音 schwa 的词尾正字法 <e> 和韵律重音 penults 方面的方言差异。我们证明重复隐蔽地发出语音特性的信号。我们得出结论，韵律介导了形态和语音的影响，并且字素与音素的对应在区域之间有所不同，从而产生了作家在写作时可能不打算传达的语音模式。我们还建议 Twitter 上的拼写重复有两个韵律来源：法语中的默认音高重音（移位或不移位）和焦点。