Replexica

Replexica automates software localization with LLMs — configure source and target languages, run replexica localize in CI/CD, and your i18n files are translated contextually (preserving placeholders, brand voice, and technical terms). For agents: integrate into GitHub Actions to auto-translate new strings on every PR, use the REST API to trigger translation runs programmatically, or run the CLI as part of a release pipeline. Supports JSON, YAML, Markdown, and framework-native formats (React i18next, Next.js App Router, Android, iOS). Context-aware: Replexica considers surrounding strings for consistent terminology. Confidence is docs-derived.

CLI: npm install -g replexica. Init: replexica init — creates i18n.json config. Config (i18n.json): {"version": 1, "locale": {"source": "en", "targets": ["es", "fr", "de", "ja"]}, "buckets": {"./src/locales/[locale].json": {"type": "json"}}}. Translate: replexica localize — reads source locale files, translates all targets. Output: translated locale files written in place. GitHub Actions: uses: replexica/replexica/ci@latest with api-key: ${{ secrets.REPLEXICA_API_KEY }}. REST API: POST /v1/localizations/run triggers a localization run. GET /v1/localizations/{run_id} retrieves status + translated output. Glossary: configure brand terms in Replexica dashboard to ensure consistent translation. Markdown: translates prose while preserving frontmatter + code blocks.

API key auth: Authorization: Bearer {api_key}. Keys from replexica.com dashboard → Settings → API Keys. HTTPS enforced. GitHub Actions: store API key as repository secret. No OAuth2. Team access in Replexica dashboard. Rate limits: apply per plan tier. Translation quality: LLM-based — suitable for application UI strings; legal/medical content should use human review. Data: source strings sent to Replexica (and underlying LLM provider) — review privacy policy for sensitive content.

Translation runs: async — poll GET /v1/localizations/{run_id} until status: "completed". Large projects: run times proportional to string count (100 strings ≈ 30s). Incremental: Replexica only retranslates changed/new strings — fast for incremental CI runs. Format preservation: placeholders ({variable}, %s, {{name}}) and HTML tags preserved. Glossary conflicts: configure glossary entries to prevent LLM from over-translating brand names. CLI error: missing API key returns clear error message. Translation cache: repeated identical strings cached — cost-efficient for large projects.

replexica.com/docs covers CLI reference, i18n.json configuration, GitHub Actions integration, supported formats, and glossary management. Getting started: npm install -g replexica, replexica init — first translation in 3 minutes. Free tier (5k strings/month). GitHub: replexica/replexica (1.5k+ stars). Community via Discord. Good documentation for a young product; GitHub Actions integration is particularly well-documented.