Writer builds AI checker to enforce a fantasy world's internal language rules

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A fiction writer developing a fantasy world with a fire god—rather than a rising sun—created an AI-powered tool to flag prose that violates the setting's internal rules. The world contains no clocks, calendars, or modern professions, making common phrases like 'yesterday,' 'three hours,' or 'the merchant said' anachronistic violations. After redefining the checker's scope in September 2026, the tool flagged 102 violations across 132 manuscript files. Contrary to the writer's expectation that errors would cluster in dialogue, statistical analysis showed violations were spread almost exactly in proportion to the manuscript's overall dialogue-to-narration ratio of 30/70. The most frequent offender was 'yesterday' (34 hits), which did skew toward dialogue, but other flagged terms offset that pattern across the full dataset.

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