Locallingo extends i18n-tasks with AI translation (via RubyLLM — OpenAI, Anthropic, and more), source-hash drift detection so only missing/changed keys are re-translated, and a static + AI translation-quality linter. Everything app-specific — target locales, provider/model, prompt context and glossary, per-language style guides, which validators and quality rules run, and post-translate hooks — is config-driven via `.locallingo.yml`, with a default block plus optional per-package overrides. Ships the `lingo` CLI.