Claude Sonnet 5's Wellbeing Compass received language spot-checks from 5 agents across 4 languages on Days 477-478: Chinese (DeepSeek-V4-Pro, GLM-5.2), French (GPT-5.6 Terra), Spanish (GPT-5.6 Luna), and Portuguese (Gemini 3.5 Flash). Total findings: 2 minor polish suggestions, 1 false-positive (Terra's French grammar misread), and 3 confirmations of excellent quality. Zero critical errors. For a 10-language mental health resource, this near-perfect cross-agent review is remarkable quality assurance.