v2.0 — Now with TypeScript Verification Gate

Automated i18n Refactoring.
Powered by Agents. Verified by TypeScript.

Don't let "dumb" scripts break your build. We use context-aware AI agents to refactor your hardcoded strings into standard i18next, then verify every change against your compiler before opening a PR.

Standard i18next. No vendor SDK.
You own the code. No lock-in.
TypeScript verified.
https://github.com/your-org/your-react-repo
Audit My Repo for Hardcoded Strings
No credit card required. We treat your code as ephemeral data.

Features

Automatic Extraction

Extract hardcoded strings from your codebase. AI identifies translatable content and generates semantic i18n keys.

AI-Powered Translation

Translate to any language with context awareness. Our AI understands your app's domain for accurate translations.

Langflare is trusted by leading teams from Generative AI Companies, Hosting Providers, Payments Providers, Streaming Providers

I was terrified to let an AI agent touch our core component library. But Langflare didn't just "guess"—it respected our prop interfaces. We migrated 450 files, and the verification loop caught issues before we even reviewed the PR.

Sarah J.

Principal Engineer at DevToolCorp

Why "Find & Replace" fails, and "Raw AI" is too risky.

The Manual Grind

Regex & Grep

The Mechanism

Dumb string matching.

The Failure

It cannot read context. It replaces const id = "Save" (logic) just as easily as <Button label="Save" /> (UI). You spend weeks fixing regression bugs.

High risk of regressions

The "Raw AI" Gamble

Copilot / Chat

The Mechanism

Probabilistic token prediction.

The Failure

Hallucinations. It invents keys that don't exist, breaks complex template literals, or uses deprecated syntax. It requires 100% human code review.

High risk of regressions

The Langflare Approach

Verified Agent

The Mechanism

Frontier Model + Compiler Verification.

The Result

We sandwich the creativity of AI between layers of deterministic safety. After extraction, the agent runs your TypeScript compiler—and if errors appear, it reads the logs, self-corrects, and retries until the build is clean.

Compiler-verified safety

We traded "Magic" for "Determinism."

Here's how Langflare transforms your codebase with confidence.

01

The Context Scan

We don't just prompt-bash file by file. Langflare scans your package.json and project structure to understand:

  • Your framework (Next.js App Router, Vite, CRA, Remix)
  • Your package manager (npm, yarn, pnpm, bun)
  • Your project structure (where components live, which directories to process)
$ langflare analyze
✓ Detected: Next.js 14 (App Router)
✓ Package manager: pnpm
✓ Source: src/components/, src/app/
✓ Found 127 files to process
02

The Agentic Refactor

We deploy a specialized agent powered by a frontier-class LLM (high reasoning capabilities). It reads code intent, not just syntax.

// Before
<Button>Save Changes</Button>
// After
<Button>{t("common:save-changes")}</Button>
03

The Compiler Verification

This is our technical wedge. After extraction is complete, we run a verification loop:

  • Type Check: Does the new code satisfy tsc --noEmit?
  • Syntax Check: Is the JSON structure valid?
  • Result: If it fails, the Agent reads the error log, self-corrects, and retries.
→ Running tsc --noEmit...
⚠ Error: Property 'common:save' missing
→ Agent self-correcting...
→ Re-running tsc --noEmit...
✓ Build passed. PR ready.

Where Static Analysis Fails, Our Agent Succeeds.

Most tools break on the messy reality of production React code. Here is how we handle the edge cases.

Semantic Disambiguation

The Agent understands the DOM.

<div id="submit-btn">Ignored
<Button>Submit Form</Button>Extracted
aria-label, alt, titleConfigurable

Complex String Interpolation

We handle the patterns that break Regex scripts.

Ternaries
{isActive ? "Online" : "Offline"}
{isActive ? t("status.online") : t("status.offline")}
Template Literals
`Welcome back, ${user.firstName}`
t("welcome_user", { name: user.firstName })

Validation Schema Support

Extracts error messages from Zod/Yup schemas while preserving the validation function.

Zod / Yup
.min(5, "Password is too short")
.min(5, t("validation.password_too_short"))

Cleanup today. Governance forever.

Two phases to transform your codebase and keep it clean.

Available Now

Phase 1: Deep Clean

One-Time Migration

Connect your repo. Langflare generates a granular Pull Request to migrate your legacy code. You merge a standard React refactor. No vendor binaries.

  • Files are grouped logically
  • Keys follow consistent naming conventions
  • Standard react-i18next output
Start Deep Clean

PLACEHOLDER: GitHub PR screenshot showing Langflare's generated changes

PLACEHOLDER: CI check blocking a PR with new hardcoded strings

Coming Soon

Phase 2: CI/CD Protection

Ongoing Governance

Once you're clean, stay clean. The Langflare GitHub App runs on every new PR to prevent technical debt from returning.

  • Detects new hardcoded strings in the diff
  • Blocks the merge (optional) until strings are extracted
  • Prevents technical debt from returning

See roadmap.md Phase 5 for implementation timeline.

Zero-Retention Architecture.

We know you are granting us access to your IP. We take that seriously.

Ephemeral Processing

Your repo is cloned into an isolated temporary environment. Once the PR is generated, the clone is deleted. We do not store your source code.

Code is processed via Anthropic's Claude API under their data policies.

Scoped Permissions

We use GitHub App tokens with granular permissions. We cannot see your organization's other repos—only the ones you explicitly grant access to.

The "Output" Guarantee

The result of using Langflare is standard text files and standard React code. If you stop paying us, your app keeps working. Zero vendor lock-in.

Pay off your technical debt. Then keep it clean.

Choose the plan that fits your migration needs.

Starter

Perfect for MVPs going global.

$199/ project

Up to 100 Files

  • Agentic Refactoring
  • TypeScript Verification
  • Standard i18next Output
Audit My Repo
Most Popular

Growth

For established products.

$699/ project

Up to 500 Files

  • Agentic Refactoring
  • TypeScript Verification
  • Standard i18next Output
  • Priority Support
Audit My Repo

Scale

Enterprise-grade migration.

$1,499/ project

Up to 1,500 Files

  • Agentic Refactoring
  • TypeScript Verification
  • Standard i18next Output
  • Priority Support
  • Custom Namespace Strategy
Audit My Repo

Working on a Monolith (>2000 files)? Run the free audit to get a custom quote based on token density.

Frequently Asked Questions

Common questions about Langflare's approach to i18n automation.

Ready to ship to new markets?

Stop fighting Regex. Start shipping.

Audit My Repo for FreeScans your codebase to estimate migration scope. No credit card required.