Choose the boundary that preserves the intended action across languages. Fluency, formatting, evidence, and account authority require different checks.
Lessons
- Translation prompts: preserve terms and machine placeholders
- Locale-aware prompts: keep values typed until rendering
- Mixed-language requests: separate intent from reply language
- Cross-language retrieval: keep policy meaning attached to its source
- Cross-locale evaluation: compare decisions, not word-for-word text