vBulletin Manual - Orphan Phrases

Orphan phrases are phrases that exist in the database but don’t have a default value in the Master Language or the Custom Master Language. This is most commonly caused by phrases becoming obsolete and being removed by an upgrade. In most cases, these phrases will no longer be used, but if you need to edit or delete these phrases, you should search for orphan phrases.

When you search for orphan phrases, you will see a screen like this:

Note:

If you do not have any orphaned phrases, you will see a message stating this.

You may Keep the phrase, which will allow you to designate a translation as the default version to be moved into the Custom Master Language, or Delete the phrase, which remove all translations of it from the database.