This peer-reviewed series publishes descriptions of the world's understudied languages, either as full-fledged grammars or as language sketches. The GSWL is an umbrella series currently consisting of the sub-categories for grammars and sketches on
Mainland and Insular South East Asia (Series Editor Paul Sidwell and Mathias Jenny),
Romance Languages (Edited by Roberta D’Alessandro),
African languages (Edited by Gerrit J. Dimmendaal), Indigenours Languages of Russia (Edited by Beáta Wagner-Nagy and Valentin Gusev), and Papuan Languages (Edited by Antoinette Schapper and Lila San Roque).
The series has published an average of one volume per year since 2014.