how to difference whether the wine?

[Innkeeper]

Most red wine is dry. The most widely distributed sweet red is Lambrusco. White wine depends on the grape. More whites than reds are off dry or sweet. Of the popular whites Chardonnay, Pinot Grigio, and Sauvignon Blanc are usually dry. Riesling and Chenin Blanc can be dry or off dry or sweet. It usually tells you on the label in the native language of the producer.