The addition of a question tag at the end removes the 'Do' at the start of a question.
Do you play basketball? You play basketball, right?
Native english speaker.
Why is "You want sleep, right" wrong? This makes sense in the same way that both "You need sleep" and "you need to sleep" make sense in english....
So "Мама хочет пить" translates into "Mom is thirsty", but this cannot be translated as "You are sleepy, right?"
Is there any reason for this, or should it be reported?
Why is it wrong to give this translation? You want to sleep, don't you?