YOU SAID:
There once was a time when this world was full of happy people.
INTO JAPANESE
この世界が幸せな人々でいっぱいになった時がありました。
BACK INTO ENGLISH
There was a time when this world filled with happy people.
INTO JAPANESE
この世界に幸せな人々がいっぱいの時がありました。
BACK INTO ENGLISH
There was a time when there were many happy people in this world.
INTO JAPANESE
この世には多くの幸せな人がいた時がありました。
BACK INTO ENGLISH
There were times when there were many happy people in this world.
INTO JAPANESE
この世には多くの幸せな人がいた時がありました。
BACK INTO ENGLISH
There were times when there were many happy people in this world.
That didn't even make that much sense in English.