YOU SAID:
the show is over when the fat lady sings
INTO JAPANESE
太った女性が歌うとき、ショーは終わります
BACK INTO ENGLISH
The show ends when the fat lady sings
INTO JAPANESE
太った女性が歌うとショーは終わります
BACK INTO ENGLISH
The show ends when the fat lady sings
That didn't even make that much sense in English.