YOU SAID:
Tristan is funny boy but he has a serious disease
INTO JAPANESE
トリスタンは変な少年が、彼は深刻な病気
BACK INTO ENGLISH
Tristan is a strange boy is he serious illness
INTO JAPANESE
トリスタンは、奇妙な少年が彼の深刻な病気が
BACK INTO ENGLISH
Tristan is a strange boy his serious illness
INTO JAPANESE
トリスタンは奇妙な少年彼は深刻な病気
it is unlikely that this phrase will ever reach equilibrium