One interpretation is that his language production module generated the sentence “It is called Horcrux”, and his conscious mind, in the midst of him saying this sentence, became aware of the fact that he knows the Parseltongue word.
One interpretation is that his language production module generated the sentence “It is called Horcrux”, and his conscious mind, in the midst of him saying this sentence, became aware of the fact that he knows the Parseltongue word.