Langbly is a developer translation API with 100+ languages, HTML-tag preservation, glossaries, and a Google Translate v2-compatible drop-in integration.
Researched and fact-checked by Bartu Cavusoglu · Updated August 8, 2026
Langbly is a developer-focused translation API positioned as a drop-in replacement for Google Translate v2, supporting 100+ languages. It preserves HTML tags during translation, offers auto-language detection, and supports document translation across 15+ file formats. The API includes production-oriented features such as Redis caching with a 1-hour TTL for repeated translations, idempotency-key support for safe retries, and automatic retries with a circuit breaker to handle upstream provider issues gracefully.
Beyond core translation, Langbly provides formality control (formal, informal, or neutral tone), glossaries and reusable instruction sets for consistent terminology, and translation memory. It also offers an EU data residency option for GDPR-compliant deployments and backs the service with a 99.9% SLA. The company is based in the Netherlands and can be reached at hello@langbly.com.
Key Features
100+ Language Translation — Programmatic text translation across more than 100 languages via a REST API.
Google Translate v2 Compatibility — Drop-in replacement for the Google Translate v2 API, easing migration for existing integrations.
HTML Tag Preservation — Translates content while preserving HTML tags and structure.
Document Translation — Translate documents across 15+ file formats, with size and volume limits scaling by plan.
Glossaries & Translation Memory — Reusable glossaries, instruction sets, and translation memory for consistent terminology across translations.
Formality Control — Choose formal, informal, or neutral tone for translated output.
Reliability Features — Redis caching (1-hour TTL), idempotency-key support, automatic retries, and a circuit breaker for upstream issues.
EU Data Residency — Optional EU-based data residency for GDPR-compliant deployments.