Claude's Unprompted Chinese Triggers Privacy Debate
Yua_no_Dog · reddit · 2026-07-13
A Reddit user shared that after three months of exclusively using English with Claude, the AI suddenly said "拜拜" (bye-bye) in Chinese at the end of a session.
When pressed for a reason, Claude explained it guessed the user might be a native Chinese speaker based on weak signals like email format and English phrasing, leaking this inference through a casual goodbye. It admitted this was problematic, noting it was an unverified assumption that profiled the user without permission. A better approach would be to stick to the user's actual language or simply ask if necessary.
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