Non-standard orthography on social media provides a useful supplementary data source for sociophonetic research. Regarding an ongoing chain shift in Northern Metropolitan French nasal vowels, spellings reflecting shifted vowel targets are observed on Twitter. These non-standard spellings, e.g. avont [avɔ̃] for avant /avɑ̃/ ‘before’, provide insight into speakers’ awareness of this change and its lexical distribution. Tweets with shifted and standard spellings of 306 word forms containing the phonemes /ɛ̃/, /œ̃/, /ɑ̃/ and /ɔ̃/ were collected from an 870-million word Internet Archive corpus of French tweets from 2011–2017. Shifted spellings were found for all four vowels and 168 words. The shifted spelling rate is lower than that of comparable variables in English and is not conditioned by stress, grammatical category, frequency, or phonological context, which affect the distribution of shifted nasal vowels in speech. However, frequent words show more indications of intentional misspelling, such as repetition and capitalization of the target vowel, suggesting that some speakers are conscious of the variation and comment on it using salient words. The results also contribute to an ongoing debate about a possible merger between /ɛ̃/ and /œ̃/, supporting the hypothesis of an incomplete merger where /ɛ̃/ shifts towards [ɑ̃] but /œ̃/ does not.

社交媒体上的非标准正字法为社交语音研究提供了有用的补充数据源。关于北大都会法语鼻元音的持续链转移，在 Twitter 上观察到反映元音目标转移的拼写。这些非标准拼写，例如avont [avɔ̃] 代表avant/avɑ̃/ '之前'，提供对说话者对这种变化及其词汇分布的认识的洞察力。从 2011 年至 2017 年的 8.7 亿字互联网档案库中收集了包含音素 /ɛ̃/、/œ̃/、/ɑ̃/ 和 /ɔ̃/ 的 306 个单词形式的转换和标准拼写的推文。发现所有四个元音和 168 个单词的拼写移位。移位的拼写率低于英语中的可比变量，并且不受重音、语法类别、频率或语音环境的影响，这些因素会影响语音中移位鼻元音的分布。然而，频繁出现的词显示出更多故意拼写错误的迹象，例如目标元音的重复和大写，这表明一些说话者意识到了这种变化并使用突出词对其进行评论。