UX Writing Style Guide

Create a comprehensive UX writing style guide for [product] to ensure consistent, effective product copy. Include: 1) Voice and tone principles with examples for different contexts, 2) Grammar and mechanics standards with common edge cases, 3) UI pattern-specific guidance (buttons, forms, errors, etc.), 4) Terminology glossary with approved terms and phrases, 5) Content frameworks for common flows (onboarding, empty states, etc.), 6) Localization considerations, 7) Accessibility requirements for text content, 8) Review process for copy changes, 9) A/B testing approach for copy optimization, and 10) Examples of before/after copy improvements with rationale.