Its Spoken Language Fading, Buton Tries a Script From Seoul That Has Global Ambitions SORAWOLIO, Indonesia -- In an elementary school here on the remote Indonesian island of Buton, a teacher named Abidin recently began to show students how to write their endangered native language -- in the Korean alphabet. Mr. Abidin carefully copied some Korean letters from a textbook onto the blackboard and asked his fourth-grade class what they spelled in their Cia-Cia tongue, a Malayo-Polynesian language related to others spoken across Indonesia. "I eat fish," they replied in unison. The students know little about Korea, 3,500 miles north...