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JSON Translation Services

JSON is the de facto format for i18n string files in React, Vue, Angular, Next.js, and React Native applications. We translate JSON localization files for web and mobile apps.

Translating JSON i18n Files Without Breaking Your App

JSON localization files for frameworks such as react-i18next, vue-i18n, and next-intl use nested key structures, interpolation variables like {{name}} or {count}, and pluralization keys such as one, other, few, and many.

A translator who edits a JSON file in a text editor and inadvertently changes a key name or removes a closing bracket will break your application build, which is why JSON belongs in a proper software localization workflow rather than a plain text editor.

  • 20+ yearsTranslation experience
  • 50+Languages supported
  • Your file formatReturned for you to use
software localization

JSON Translation: Key Capabilities

  • Key Structure Preservation

    All JSON keys, nesting levels, and structural brackets are preserved exactly. Only string values are translated. The output JSON parses without errors.

  • Interpolation Variable Locking

    Interpolation variables such as {{name}}, {count}, %s, and {0} are identified and locked before translation, preventing accidental modification.

  • Pluralization Rule Support

    Target-language plural forms (one, few, many, zero, other) are generated according to Unicode CLDR plural rules for the target language.

  • Syntax Validation

    The delivered JSON file is validated for syntactic correctness before delivery. No silent errors, missing commas, or encoding issues will reach your build system.

What Our Clients Say

  • “Great communication, perfect translations in different languages in a very short notice. I would recommend! We are very pleased, thank you :-)”
    Melissa L.Google review (INTL), a year ago
  • “We contacted Betranslated services in July 2024. My daughter had time sensitive documents that required certified translation from Spanish to English.”
    Lyne G.Google review (SL), a year ago
  • “I recently used a translation agency in France to translate several administrative and commercial documents into Spanish.”
    paula E.Google review (FR), 2 years agoTranslated from French

JSON Translation: Frequently Asked Questions

Everything you need to know about translating JSON strings files.

Which i18n libraries' JSON formats do you support?

We support the JSON formats used by react-i18next, next-intl, vue-i18n, Angular's i18n tooling, LinguiJS, and Phrase. If you use a custom JSON schema, please send a sample file before requesting a quote so we can confirm compatibility.

Can you handle JSON files with deeply nested key structures?

Yes. Deeply nested JSON structures are supported. Keys at any nesting level are preserved exactly. If your JSON has both translatable string values and numeric or boolean values at the same level, only string values are sent for translation.

What happens if the target language needs plural forms not present in the source?

English typically has only two plural forms (one and other). Languages such as Polish, Russian, and Arabic use three to six plural forms. We generate all required plural forms for the target language according to Unicode CLDR plural rules and add them to the JSON output under the correct keys.

4.96/5.0 from 178 Google reviews

Ready to Translate Your JSON Files?

Send us your JSON strings file and we will quote as quickly as possible and return the translation in your file format.

  • Native-speaking specialists
  • Local-market strategy
  • Fast turnaround
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