feat(i18n): globalization pipeline — frontend i18n with backend locale support by RamGopalSrikar · Pull Request #12933 · langflow-ai/langflow

RamGopalSrikar · 2026-04-29T18:25:18Z

Summary

Full i18n (globalization pipeline) implementation for Langflow.

Frontend (109 files):

react-i18next setup with 7 language support (en, fr, ja, es, de, pt, zh-Hans)
Lazy-load non-English locale files via Vite dynamic imports
Language selector in Settings > General page
Translate canvas node field labels, outputs, and templates on language change
Preserve user-customized node `display_name`/`description` on language switch — only default names translate, user-renamed nodes stay unchanged
Translate note nodes via dedicated `/flows/{id}/note_translations` endpoint
Translate UI strings across modals and pages (MCP, Knowledge Base, Settings, Model Providers, playground, etc.)
Content-hash component keys for stable GP translations

Backend (7 files):

6 locale JSON files (fr, es, ja, de, pt, zh-Hans) with translated component metadata
`build_component_display_names()` in `i18n.py` — bundles all known display_name/description translations across locales into the `/api/v1/all` response so the frontend can distinguish default names from user-customized ones

Test plan

Language switch in Settings > General translates UI strings
Canvas node field labels translate on language change
Default-named nodes translate; user-renamed nodes stay unchanged
Note nodes in starter flows translate
TypeScript build: `cd src/frontend && npx tsc --noEmit`
Backend tests: `python -m pytest src/backend/tests/unit/test_i18n.py -v`

Squash of PR #12825 (feat/gp-frontend-i18n-batch-c) onto release-1.10.0. - IBM Globalization Pipeline integration with GP REST API client - react-i18next setup with 7 language support (en, fr, ja, es, de, pt, zh-Hans) - Lazy-load non-English locale files via Vite dynamic imports - Language selector in Settings > General page - Backend: serve translated component metadata via Accept-Language header - Translate canvas node field labels, outputs, templates on language change - Translate note nodes via dedicated endpoint - Translate all UI modals and pages (MCP, Knowledge Base, Settings, etc.) - CI: GP upload/download workflows, auto-bake note keys - Content-hash component keys for stable GP translations - Preserve user-customized node display_name/description on language switch

coderabbitai · 2026-04-29T18:25:24Z

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…ip ci]

…nges)

package-lock.json: npm noise, not part of this feature flows_helpers.py: unrelated blank-line change

- starter_projects/*.json: trivial trailing newline only, not i18n content - api/v1/flows.py: unrelated deployment guard removal and flow update refactor - tests/unit/test_i18n_note_translation.py: minor non-functional changes

…8n.py Resolves ruff F401 (content_hash imported but unused) and PLW2901 (for-loop variable `node` overwritten by assignment).

codecov · 2026-04-29T18:41:41Z

Codecov Report

❌ Patch coverage is 60.31390% with 177 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.91%. Comparing base (6b7703c) to head (0267029).

Files with missing lines	Patch %	Lines
...ontend/src/components/core/jsonEditor/menuUtils.ts	41.37%	17 Missing ⚠️
...s/deploymentsPage/components/providers-content.tsx	10.00%	9 Missing ⚠️
...omponents/core/editFlowSettingsComponent/index.tsx	66.66%	8 Missing ⚠️
...eBarFolderButtons/components/mcp-server-notice.tsx	12.50%	7 Missing ⚠️
...components/core/jsonEditor/useMenuCustomization.ts	58.82%	7 Missing ⚠️
src/frontend/src/pages/DeleteAccountPage/index.tsx	0.00%	6 Missing ⚠️
...s/tableComponent/components/TableOptions/index.tsx	37.50%	5 Missing ⚠️
...iew/chat-header/components/chat-header-actions.tsx	28.57%	5 Missing ⚠️
src/frontend/src/hooks/flows/use-save-flow.ts	28.57%	5 Missing ⚠️
...nericNode/components/NodeDialogComponent/index.tsx	20.00%	4 Missing ⚠️
... and 45 more

Additional details and impacted files

@@                Coverage Diff                 @@
##           release-1.10.0   #12933      +/-   ##
==================================================
+ Coverage           53.82%   53.91%   +0.08%     
==================================================
  Files                2051     2051              
  Lines              187304   187559     +255     
  Branches            28150    28145       -5     
==================================================
+ Hits               100817   101121     +304     
+ Misses              85377    85327      -50     
- Partials             1110     1111       +1

Flag	Coverage Δ
backend	`57.13% <100.00%> (+0.03%)`	⬆️
frontend	`54.11% <59.95%> (+0.12%)`	⬆️
lfx	`49.74% <ø> (-0.01%)`	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/backend/base/langflow/utils/i18n.py	`63.63% <100.00%> (ø)`
...Nodes/GenericNode/components/outputModal/index.tsx	`38.58% <100.00%> (+0.18%)`	⬆️
...e/appHeaderComponent/components/FlowMenu/index.tsx	`93.93% <100.00%> (ø)`
...core/assistantPanel/components/assistant-input.tsx	`90.29% <100.00%> (+0.07%)`	⬆️
...istantPanel/components/assistant-loading-state.tsx	`96.93% <100.00%> (+0.05%)`	⬆️
...ts/core/canvasControlsComponent/CanvasControls.tsx	`90.00% <100.00%> (+0.11%)`	⬆️
...omponent/components/sideBarFolderButtons/index.tsx	`42.41% <100.00%> (ø)`
...omponent/components/inputGlobalComponent/index.tsx	`91.93% <100.00%> (+0.08%)`	⬆️
.../chat-view/chat-input/components/input-wrapper.tsx	`77.71% <100.00%> (+1.60%)`	⬆️
...rc/frontend/src/hooks/flows/use-restore-version.ts	`98.71% <100.00%> (+0.03%)`	⬆️
... and 76 more

... and 44 files with indirect coverage changes

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…n-clean

…omponent

…x i18n test mock The squash merge brought in older versions of deployment page components, stripping functionality added by PRs that landed on release-1.10.0 after our feature branch diverged (duplicate tool name validation, deploy choice dialog update flow, step-type/step-attach-flows logic). Restored 14 files to their release-1.10.0 state. Also added __esModule: true to the i18n mock in flowStore.test.ts to fix the i18n_1.default.t TypeError.

…adModal to release-1.10.0 These files had functionality stripped by the squash merge (buildKeyPairPayload/ buildArgsPayload helpers, save version dialog logic, modal height/validation constants). Restored to release-1.10.0 state.

github-actions · 2026-04-29T21:24:43Z

Frontend Unit Test Coverage Report

Coverage Summary

Lines	Statements	Branches	Functions
	36.23% (42225/116547)	67.83% (5785/8528)	36.26% (970/2675)

Unit Test Results

Tests	Skipped	Failures	Errors	Time
4095	0 💤	0 ❌	0 🔥	9m 27s ⏱️

github-actions Bot added the enhancement New feature or request label Apr 29, 2026

github-actions Bot and others added 2 commits April 29, 2026 18:26

chore: auto-bake note keys and regenerate backend locales/en.json [sk…

3a5b959

…ip ci]

revert: restore scripts/gp to release-1.10.0 state (no functional cha…

8b938b5

…nges)