I would think so, if you're asking if someone has an auditory impairment or can't read, and they muddle it up slightly.
We have a citizenship oath. I went to a ceremony at the Museum of Civilization, as it then was, when the judge said to me he did it two words at a time. He started by saying “I swear”, and everybody said, “I swear”, etc. He said the reason was that a lot of people didn't speak either official language very well and were going to muddle it up slightly. That doesn't have any legal meaning, but they want to get it right. They're trying.
He's an experienced judge. He's used to dealing with this. Some of our people administering elections might not be, and there would be some kind of issue of that sort. The oath is still proper, full and complete.