Translation Services Provider (TSP)

A translation services provider, commonly abbreviated as TSP, and often used interchangeably with language service provider (LSP), is the entity a company or team turns to when they need translation work done by external professionals. TSPs range from large multilingual agencies handling millions of words across dozens of languages, to boutique firms specializing in a single domain, to individual freelance translators offering direct services.

What distinguishes a professional TSP from ad hoc or machine-only translation is accountability. Reputable TSPs operate under defined quality standards, employ qualified linguists, apply review processes, and often hold certifications such as ISO 17100:2015 — the international standard for translation service quality covering human resources, workflow, and project management requirements.

🏢 What TSPs typically offer #️⃣

The core service is translation, but most TSPs provide a broader range of language services:

• Translation — converting written content from a source language into one or more target languages
• Localization — adapting content for a specific locale, including cultural, technical, and formatting adjustments
• Post-editing — reviewing and correcting machine translation output to meet quality standards
• Interpretation — spoken language services for meetings, conferences, or legal proceedings
• Desktop publishing (DTP) — reformatting translated documents to match the original layout
• Transcreation — adapting creative or marketing content for cultural resonance rather than literal accuracy
• Terminology management — building and maintaining glossaries and termbases for consistency across projects

🔍 Key points about TSPs #️⃣

• TSPs vary significantly in size, specialization, and quality. A large multilingual agency may cover 100+ languages with dedicated project managers and domain specialists, while a boutique firm may serve a narrow industry with a small core team.
• ISO 17100:2015 certification is a recognized quality benchmark for TSPs. It specifies minimum requirements for translator qualifications, revision processes, and project management, but certification is voluntary and not universal.
• The distinction between TSP and LSP is largely semantic in practice. ISO standards use “language service provider” as the formal term; many companies use both interchangeably in their marketing.
• For software localization specifically, working with a TSP that has experience in i18n workflows, file format handling, and TMS integration is important. General document translation experience does not automatically transfer to software localization.
• Some TMS platforms, including Localazy, allow teams to order professional translations directly through the platform, connecting to vetted TSP networks without managing the vendor relationship separately.

🤝 TSPs in the localization ecosystem #️⃣

For digital product teams, a TSP is typically one layer in a broader localization workflow rather than the entire solution. Developers handle i18n and string extraction, a TMS manages the translation pipeline, and a TSP, whether a full agency or individual freelancers, provides the human translation and review. How tightly these layers integrate depends on whether the TSP works directly within the TMS or handles files through manual exchange.

Teams with high translation volume, multiple languages, or specialized content such as legal, medical, or marketing copy often benefit from a long-term TSP relationship, where the provider builds familiarity with the product, terminology, and brand voice over time.

Learn more about ordering professional translations in Localazy.