Simplify the following text for a Grade 10 native English-speaking person.
Original: Thundorf ( pronounced , in the local dialect or ( Ë tuÉ ndÉ rÉ fË ) ) is a municipality in the district of district of Frauenfeld in the canton of Thurgau in Switzerland .
Simplified: Thundorf is a municipality of the district of district of Frauenfeld in the canton of Thurgau in Switzerland .