Apparently only two people know. But the last two speakers of this indigenous Mexican language refuse to talk to each other.
The two men in their 70s from the village of Ayapan, Tabasco, in southern Mexico, are the only remaining speakers of their local version of the Zoque language.
Fernando Nava, head of the Mexican Institute for Indigenous Languages told BBC News the two men have drifted apart. He said: “We know they are not to say enemies, but we know they are apart. We know they are two people with little in common.”