An oath administered through an interpreter raises one central risk: the notary is relying entirely on a third party to convey both what the notary said and what the signer answered, and the notary cannot verify either. That reliance is only acceptable if the interpreter is disinterested and competent, which is why the interpreter must not be a party to the transaction, must not be named in the document, and must not stand to benefit from it. A close personal relationship is not by itself disqualifying, but a stake in the document is. Competence matters equally, since an inaccurate rendering of the oath means no oath was administered at all — hence the expectation that the interpreter be a certified or registered interpreter rather than whoever happened to come along. The notary should also record the interpreter's involvement in the journal. What the notary need not do is speak the language personally, and the presence of a language barrier is not a reason to refuse a jurat outright.