YOU SAID:

his pants fell down into the mekong river

INTO JAPANESE

彼のズボンはメコン川に落ちた

BACK INTO ENGLISH

His pants fell on the Mekong

INTO JAPANESE

彼のズボンはメコンに落ちた

BACK INTO ENGLISH

His pants fell on mekong

INTO JAPANESE

彼のズボンはメコンに落ちた

BACK INTO ENGLISH

His pants fell on mekong