#20905: i18n: add bulgarian to openclaw

## Summary Describe the problem and fix in 2–5 bullets: - Problem: Missing Bulgarian in OpenClaw - Why it matters: So non-technical Bulgarians can also benefit - What changed: Added bulgarian language - What did NOT change (scope boundary): Anything else ## Change Type (select all) - [ ] Bug fix - [ ] Feature - [ ] Refactor - [ ] Docs - [ ] Security hardening - [x] Chore/infra ## Scope (select all touched areas) - [ ] Gateway / orchestration - [ ] Skills / tool execution - [ ] Auth / tokens - [ ] Memory / storage - [ ] Integrations - [ ] API / contracts - [x] UI / DX - [ ] CI/CD / infra ## Linked Issue/PR Relates to https://github.com/openclaw/openclaw/issues/3460 ## User-visible / Behavior Changes User can now switch to Bulgarian language in the Control UI Language picker. ## Security Impact (required) - New permissions/capabilities? (`Yes/No`) No - Secrets/tokens handling changed? (`Yes/No`) No - New/changed network calls? (`Yes/No`) No - Command/tool execution surface changed? (`Yes/No`) No - Data access scope changed? (`Yes/No`) No - If any `Yes`, explain risk + mitigation: N/A ## Repro + Verification ### Environment - OS: Any - Runtime/container: N/A - Model/provider: N/A - Integration/channel (if any): N/A - Relevant config (redacted): N/A ### Steps 1. Open Control UI page 2. Open the "Language" dropdown and select Bulgarian 3. All available strings are now translated to bulgarian ### Expected - All existing translations, titles, subtitles and nav items switch to Bulgarian ### Actual - All existing translations, titles, subtitles and nav items switch to Bulgarian ## Evidence Attach at least one: - [ ] Failing test/log before + passing after - [ ] Trace/log snippets - [ ] Screenshot/recording - [ ] Perf numbers (if relevant) ## Human Verification (required) What you personally verified (not just CI), and how: - Verified scenarios: - Edge cases checked: - What you did **not** verify: ## Compatibility / Migration - Backward compatible? (`Yes/No`) Yes - Config/env changes? (`Yes/No`) No - Migration needed? (`Yes/No`) No - If yes, exact upgrade steps: N/A ## Failure Recovery (if this breaks) - How to disable/revert this change quickly: Revert this commit only - Files/config to restore: `i18n/lib/translate.ts` and other `i18n/lib/` touched files - Known bad symptoms reviewers should watch for: Odd styling due to the lenght of some words in english vs bulgarian ## Risks and Mitigations List only real risks for this PR. Add/remove entries as needed. If none, write `None`. - Risk: Odd styling in some places to the lenght of the English vs Bulgarian translations - Mitigation: Find a more suitable shorter/longer version of the bulgarian translation <!-- greptile_comment --> <h3>Greptile Summary</h3> Added Bulgarian (`bg`) language support to OpenClaw's i18n system. Updated locale type definitions, translation manager with auto-detection and lazy loading for Bulgarian, created complete Bulgarian translation file with all 99+ translation keys matching the English structure, and updated all existing locale files to include Bulgarian in the language picker. - Complete Bulgarian translations provided for all UI strings - Auto-detection for `navigator.language` starting with "bg" properly implemented - Lazy import logic correctly handles the Bulgarian locale - All language picker dropdowns updated across locale files <h3>Confidence Score: 5/5</h3> - This PR is safe to merge with no risk - The implementation is straightforward and follows established patterns. All necessary files are updated consistently, translations are complete, and both auto-detection and lazy loading are properly implemented. The previous review comments have been addressed. This is a well-executed i18n addition with no breaking changes. - No files require special attention _{Last reviewed commit: 0168664} <!-- greptile_other_comments_section --> <!-- /greptile_comment -->