Translations:Help:Extension:Translate/Translation aids/9/en

Every requested aid is guaranteed to have a key here (until the request fails miserably), but while we use exceptions in the PHP side, in the JavaScript side each aid may have the key "error" set with the error message set as value. You can see an example of this above with. It signals that it cannot display a diff, because there have been no changes to the definition since last translation.