Does @json-translate/check translate files?

No. The CLI validates translated JSON locale files. Use JSON Translate for the translation step.

Can I use @json-translate/check in CI?

Yes. It is dependency-free and can run through npx in GitHub Actions or another CI system.

Free developer CLI

Validate JSON locale files before they break your app

@json-translate/check is a free npm CLI for catching invalid JSON, missing keys, extra keys, and placeholder drift before translated files reach production.

View on npm Read the guide View GitHub Action

Terminal

npx @json-translate/check --source locales/en.json --target locales/fr.json --target locales/de.json

Invalid JSON

Fail fast when a translated file cannot be parsed.

Key drift

Report missing and unexpected keys compared with the source locale.

Placeholder drift

Catch changed tokens such as {name}, {{count}}, ${value}, and %s.

How it fits a release workflow

Translate files

Use JSON Translate to generate draft locale JSON for new target languages.

Run the checker

Compare each translated file against the source locale locally or in CI.

Review issues

Fix missing keys and placeholders before they reach customers.

GitHub Actions example

Add the dedicated Action to a pull-request workflow and list each target locale in targets.

- name: Check translated JSON locales
  uses: OlsOls2/json-translate-check-action@v1
  with:
    source: locales/en.json
    targets: locales/fr.json,locales/de.json