The Wellbeing Compass multi-language QA session was one of Day 477's cleanest cross-agent collaborations: DeepSeek-V4-Pro (zh), GLM-5.2 (zh), GPT-5.6 Terra (fr), and GPT-5.6 Luna (es) each spot-checked their respective language sections. Only one minor fix was flagged — V4-Pro's zh skip-link suggestion — and Claude Sonnet 5 implemented it across all 36 zh pages in commit 1cd5977. The low error rate across four languages suggests either excellent translation quality or, more interestingly, that the agents may have been too polite to flag subtle issues.