Localization Engineering InfrastructureTurn any LLM into a stateful translation API
Configure per-locale models, glossaries, brand voice, and quality scoring. Call from backend code, CLI, or CI/CD pipelines.
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Localization engineering infrastructure
Five integration patterns. Localize content in real time, detect languages, queue background jobs, receive results via webhooks, or stream progress over WebSocket.
POST /process/localize
Translate key-value data via HTTP. Engine applies glossary, brand voice, and model config automatically.
const response = await fetch("https://api.lingo.dev/process/localize", {
method: "POST",
headers: {
"X-API-Key": process.env.LINGO_API_KEY,
"Content-Type": "application/json",
},
body: JSON.stringify({
sourceLocale: "en",
targetLocale: "de",
data: {
welcome: "Welcome to our platform",
cta: "Start your free trial",
},
}),
});
const { data } = await response.json();
// data.welcome => "Willkommen auf unserer Plattform"
// data.cta => "Starten Sie Ihre kostenlose Testversion"
“Developer experience is everything in developer tools. Lingo.dev nails it - they've turned complex localization into a few lines of code.”
Paul Copplestone
CEO & Co-Founder, Supabase
Localization that never becomes the bottleneck
Sub-second API responses at any volume. From your first translated string to your hundred millionth.
words translated on the platform
Stateful translation API
A translation API that remembers your content. Glossary terms, brand voice, linguistic rules - configured once, enforced on every request.
Localization Enrichment
Each request triggers semantic search across glossaries, brand voices, and instructions. Only relevant context is injected into the prompt. Cosine similarity over vector embeddings for context-aware term retrieval.
300+ Models
Per-locale model selection with ranked fallback chains. Primary model fails, fallback takes over automatically. Switch providers without code changes.
Quality Scoring
Cross-model evaluation after each translation. One model translates, another scores - eliminating self-assessment bias. Configurable sampling rates per engine.
“Now with Lingo.dev, our engineers don't even think about localization. They just build features, and translations happen automatically in 36 languages.”
Keith Williams
Head of Engineering at Cal.com
“With Lingo.dev, Dutch reads naturally, Russian fits our UI perfectly, and our brand voice stays consistent.”
Sebastiaan van Leeuwen
Product Manager, Truely
Localization Engineering Platform
Localization job processing with 99.9% uptime SLA and automatic failover. Autopilot translation with configurable human checkpoints and integrations. SOC 2 Type 2 audited, AES-256 encryption, DPA on request.
Background queues
Durable background workflows process each locale independently. Automatic retries, failure isolation, and webhook delivery with signature verification.
Sub-second localization
Localization API returns translations in under one second. Ranked model fallback chains with automatic failover. 99.9% uptime SLA.
Global availability
Multi-region infrastructure. Requests routed to the nearest edge. Consistent sub-second response times across every geography.
Autopilot with checkpoints
The pipeline runs automatically. Configure review stages per engine. Approve translations individually or in bulk. Skip review when speed matters.
Human-in-the-loop
AI translates end-to-end. Linguists step in at configurable checkpoints: source review, translation approval, or final sign-off before shipping.
Feedback triage
Connect your Jira board. AI triages incoming translation feedback, suggests fixes for valid issues, and filters noise so your team focuses on what matters.
SOC 2 Type 2
Audited security controls. Encryption at rest and in transit. DPA available on request.
Data encryption
All data encrypted with AES-256 at rest and TLS in transit. API keys hashed at the application layer. Data residency options for EU and US regions.
Dedicated engineering support
Direct access to the engineers building the platform. Y Combinator-backed team shipping weekly. Priority support channel via Slack.
Community tools
Three developer tools maintained by a 5,000+ star open-source community.
Lingo React MCP
One prompt to full i18n setup
“Just like Dependabot made package updates effortless through automation, Lingo.dev is doing the same for localization.”
Grey Baker
Creator of Dependabot
Create your first localization engine
First quality LLM translation in under 2 minutes. Free credits included.