length-ratio

Default severity: warning

What it checks

A translation far shorter or longer than its source is often truncated, left half-done, or a different message pasted in. The ratio uses characters without placeholders and tags; bounds default to 0.3–2.5 and the lower bound is halved for Chinese, Japanese, Korean, Thai and Indic scripts. Short sources (under 10 characters) are skipped.

Example

A translation more than 2.5 times the length of its source. Config used for both runs:

{
  "sourceLocale": "en",
  "files": [
    {
      "format": "next-intl-json",
      "path": "messages/{locale}.json"
    }
  ]
}

{
  "retry": "Try again later"
}

{
  "retry": "Veuillez réessayer un peu plus tard, lorsque la connexion sera rétablie."
}

{
  "retry": "Try again later"
}

{
  "retry": "Réessayez plus tard"
}

Change its severity

{
  "checks": {
    "length-ratio": "error"
  }
}

Use "off" to disable it. To hide one finding, add "suppress": ["length-ratio:retry"]; a suppress rule that stops matching is reported so it can be removed.

All checks