What jazzy French progressive rock group has no umlauts in its name but released several albums with umlauts in the title, including Mëkanïk Dëstruktïẁ Kömmandöh, Köhntarkösz, and Üdü Ẁüdü? (Hint: the band had so many weird titles because group leader Christian Vander created a fake alien language called Kobaïan for the band's lyrics.)
Magma