A notarial act depends on things the notary must establish personally: that the signer understands what act is being performed, is acting willingly, and — for a jurat — actually takes the oath. Each of those depends on direct exchange between the notary and the signer, and an intermediary breaks it. If the notary cannot communicate directly with the signer, the notary cannot know whether the signer's answers are their own, whether questions were rendered accurately, or whether the person is under pressure from the very individual doing the translating. That last risk is not theoretical: an interpreter who is a friend, a relative or an interested party is often the person whose influence the notary most needs to detect. California therefore expects direct communication with the signer. The distractor answers all offer procedural fixes — swearing the friend in, journaling the arrangement, relying on the document being in English — none of which restores the notary's ability to verify anything for themselves. The remedy is to refer the signer to a notary who speaks the language.