I think since he had eaten his flesh that he could understand him? Just my theory lol
His human body is dead. Guy called him Grandpa so after Aka died, he went to live in the village and had kids, I guess. Aka waited for him to live out his human life, and now they're living as non-human beings.
But aka didnt die though?i think he got saved by his own kind
he can speak the demon’s language because he ate aka’s flesh. plus, the seme is a granpa who turned young again after eating that flesh. i think aka never died in the mountain
nah that wasn't his kid is was the kid of the village leader you know the one who apologized to him. I think what others have said seems correct but it could go either way, maybe he died and that's really his heaven but i think the story does make it out to be more that aka never died and eating his flesh made the other young and alive and able to understand him.
So how could he suddenly speak human language?i thought it was in his system to not comprehend human language?is he now living with his demon tribe?and sakiichi got his youth again because he ate his flesh?sakiichi got married and had kids?