"बच्चे खेल रहे हैं।"

Translation: The children are playing.

[U7K7atnO]

Shouldn't "Children are playing" be accepted? They are basically equivalent English sentences and I don't see what could make one a better translation.

[Zerenei]

It should be accepted, yes. Articles aren't used in Hindi, so बच्चे खेल रहे हैं translates as both "Children are playing." And "The children are playing."