This volume pays homage to the legacy of William D. Keel and the significant impact of his research on German in contact settings from myriad perspectives and traditions. It includes structural and sociolinguistic studies focusing on varieties of German spoken throughout the world, including Midwestern varieties of Low German, Pennsylvania Dutch, Texas German, Zarzer German in Slove-nia, and the use of different varieties of Standard German in the second language classroom. The contributions span multiple domains of linguistic inquiry, such as phonology, morphosyntax, syntax, and second language acquisition. Collectively, they contribute to ongoing research on contact varie-ties of Germanic language and how they impact sociolinguistic and generative/theoretical theory as well as pedagogical choices involving varieties of German in instructed second language acquisition. The contributions thus are a fitting tribute to William D. Keel's far-reaching legacy in research on bilingualism and, in particular, German-Sprachinseln throughout the world.