Simplify the following text for a Grade 7 native English-speaking person.
Original: Wunderlich was soon noted as a brilliant young tenor , especially in Mozartian roles , but he later expanded his reach to the full range of the lyric tenor repertoire . It was the fashion during Wunderlich 's career for German theaters to perform operas in the local rather than original language .
Simplified: Wunderlich soon became known as a brilliant young tenor .