YOU SAID:
Elvis died on the bog.
INTO JAPANESE
エルヴィスは沼地で死んだ。
BACK INTO ENGLISH
Elvis died in a swamp.
INTO JAPANESE
エルヴィスは、沼で死亡しました。
BACK INTO ENGLISH
Elvis has died in the swamp.
INTO JAPANESE
エルヴィスは、沼で死去しました。
BACK INTO ENGLISH
Elvis has died in the swamp.
That didn't even make that much sense in English.