Translation:What did the kids drink at lunch?
I translated it as "What did the children drink at the lunch?" and it said that I used the wrong word and that the correct translation was "What did the children drink at lunch?" The only word that I use that is different is the article "the" before "lunch". While I can understand that it might generally be translated the way they do, is there any reason why including the article "the" before "lunch" is wrong?