Book excerpt: This volume contains a selection of papers from the 10th International Conference on Language Variation in Europe (ICLaVE 10), which was organized by the Fryske Akademy and held in Leeuwarden/Ljouwert (the Netherlands) in June 2019. The editors have selected thirteen papers on a wide range of language varieties, geographically ranging from Dutch-Frisian contact varieties in Leeuwarden to English in Sydney, Australia. The selection includes traditional quantitative and qualitative approaches to different types of linguistic variables, as well as state-of-the-art techniques for the analysis of speech sounds, new dialectometrical methods, covariation analysis, and a range of statistical methods. The papers are based on data from traditional sources such as sociolinguistic interviews, speech corpora and newspapers, but also on hip hop lyrics, historical private letters and administrative documents, as well as re-analyses of dialect atlas data and older dialect recordings. The reader will enjoy the vibrant diversity of language variation studies presented in this volume.