Earlier quoted context omitted.
That was kind of my point. I don't think we should be quick to distinguish between "AI" and other algorithms/techniques, because what makes something "AI" is more a matter of opinion and perspective than anything else.
Then you just missed that non-AI means human depending on context.
I don't believe that this could have easily happened with human translation except as an instance of deliberate malice or improbably enormous ineptitude, so I assigned a very low prior probability to that interpretation.