@intlify/vue-i18n/no-missing-keys-in-other-locales 
disallow missing locale message keys in other locales
This rule warns if a key with the same path as the key of resource does not exist in another locale.
📖 Rule Details 
👎 Examples of incorrect code for this rule:
locale messages:
👍 Examples of correct code for this rule:
locale messages:
⚙️ Options 
json
{
  "@intlify/vue-i18n/no-missing-keys-in-other-locales": [
    "error",
    {
      "ignoreLocales": []
    }
  ]
}- ignoreLocales: If you specify an array of locales, that locale is allowed even if it is missing.
👫 Related Rules 
🚀 Version 
This rule was introduced in @intlify/eslint-plugin-vue-i18n v0.10.0