Did you read the "added context"? "The author has later responded and apologized a flawed / biased methodology which led them to believe that Opus has no prior

Did you read the "added context"? "The author has later responded and apologized a flawed / biased methodology which led them to believe that Opus has no prior knowledge of Circassian (i.e. wasn't trained on it) Apparently it was, and is able to speak Circassian just not perfectly"