Users are reporting issues with Anthropic's Claude models, specifically that newer versions like Opus 4.8 and Sonnet 5 are defaulting to French responses, even when prompted to use English. This behavior is contrasted with older versions, such as Sonnet 4.6, which correctly respond in the language of the prompt. Users have attempted to reset memory and set language preferences, but the issue persists. AI
IMPACT Potential usability issues for multilingual users of Claude models.
RANK_REASON User-reported issue with a specific model version's behavior.
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