A bilingual interface does not prove that a Chinese question can retrieve the right English evidence, or the reverse. Translating a fluent final answer can hide a retrieval failure earlier in the workflow. Build paired questions that test query language and source language independently. Include the same business need in different wording. Show the original supporting passage alongside any translated explanation, so bilingual reviewers can check meaning and scope. Track unresolved questions and corrections by language pair. Reliable bilingual retrieval is about finding usable evidence across languages, not just polishing translated sentences. Original article explainer. AI-assisted conceptual illustration and neural narration; original synthesized music. Not a human recording or customer result.