The compilation of a body of information as large as the Ethnologue over the last six and a half decades is the result of the cooperation and participation of a multitude of contributors. Lamentably, space does not permit a comprehensive listing of every contributor since Ethnologue came into existence. This edition has benefited particularly from the contributions of researchers, language fieldworkers, and users of the languages who have freely given their time and expertise to improve the accuracy and quality of the data. We are especially grateful to those who have joined our team of Field Contributors, as well as to a growing number of online registered users who contribute valuable input through the Feedback tabs on the website.

Gary F. Simons, as Executive Editor, has provided the oversight and coordination for the task of bringing this new edition into existence, as well as guiding the process of change as we seek to keep improving the content and coverage of Ethnologue . David M. Eberhard, as General Editor, has provided overall direction for the editorial staff and for the data gathering activities of the Ethnologue.Charles D. Fennig, Managing Editor, has supervised the data entry process, tracked changes, dealt with thousands of electronic and hard copy communications, and has done a great deal of in-depth research in response to communications from users. M. Paul Lewis, having stepped down after 12 years in the role of General Editor, has continued to provide us with valuable assistance as an Editorial Consultant. The editorial team is augmented by the work of Colleen Ahland as Language Classification Editors, Albert Bickford as Sign Languages Editor, Lorna Priest Evans as Script and Writing Systems Editor, and Linda Simons as Bibliographer. Rounding out the editorial staff is a team of research assistants who have contributed greatly through their data gathering efforts: Beth Brye, Stephen Graham, Trina Graham, Kiersten Henkel, Robert Johnson, and Abbey Thomas.

Technical support for the Ethnologue database and the systems that allow us to edit the information and produce publications from it has been provided by Chad White, webmaster and lead developer. Roger Hanggi and Donald May have provided additional database support.

The language maps have been produced under the direction of SIL’s Lead Cartographer, Matt Benjamin, by John Amdahl, Dale Baumgartner, Joe Bryant, Marcus Love, and Irene Tucker with additional research by Colin Davis and Eva Horton, and with quality assurance from Beth Brye and technical assistance from Stephen Tucker. Significant help in updating the maps for this edition has been received through personal communications from the following: Dan Agee, Michael Araru, Michael Bauer, Ginger Boyd, Sima Brankov, Matthais Brenzenger, Jaime Casseb, Nate Cheeseman, North Cady, Shane Devereux, Dave Eberhard, Michael Elizondo, Forum for Language Initiatives (FLI), Ryan Gehrmann, Matthew Harley, Doug Inglis, Linda Jordan, Karsten Legère, John Livingstone, Jason Lobel, Andrea Lunardon, Ian Maddieson, Manang Languages Project, Adam Manvell, Johannes Merz, Bernadette Mitterhofer, John Muniru, Angi Williams Ngumbu, Prosper Nongnide, Richard Nzogi, Rich Rudowske, Hannah Sande, Bonny Sands, Phillip Schuring, Nathan Statezni, Christa Toedter, Cornelius Tudu, Alan Vogel, John Watters, Andy Weathers, Ursula Williams, Mary Ruth Wise, and Katarzyna Wojtylak.

The Ethnologue benefits greatly from the close cooperation of Melinda Lyons, ISO 639-3 Registrar, who has assisted us in keeping our database aligned with the ISO 639-3 inventory of identified languages.

The updated information reported in this edition reflects the cooperation and communications over the last year from hundreds of researchers in the field as well as members of language communities who have made contact with us to contribute updated information. The change records in our database show that 264 additional people beyond the project staff named above have contributed at least one update to the database since the previous edition was published one year ago.

We want to give special recognition to our most prolific contributors. Each of the following 22 people contributed more than 35 updates to this edition: Graham Baxter, Denise Bryce, Nate Cheeseman, Dwayne Emberson, Eszter Ernst-Kurdi, Wassim Hamdi, Cameron Hamm, David Heath, Rob Hess, Denise Hovland, Mari-Sisko Khadgi, Paulus-Jan Kieviet, Sue McQuay, Bernadette Mitterhofer, Bill Morrison, Jaymee Murdoch, Devin O’Bannon, Ali Robinson, Sarah Shackelford, Nathan Statezni, and Paul Sundberg.

The list of contributors continues with the following 59 who contributed 5 or more updates: Ted Bergman, Bhabendra Bhandari, Ginger Boyd, Stuart Cameron, John Carter, Center for Aboriginal Studies, Brenda Clark, Micah Clark, Jim Courson, Ruth Cowan, Nico Daams, Jonathan Dangana, Jay Day, Ken Decker, Solomon Donsanda, Dale Duhe, Amitabh Vikram Dwivedi, Pam Echerd, Steve Echerd, Jaap Feenstra, Ryan Gehrmann, Matthias Gerner, Maik Gibson, Bill Hall, Wassim Hamdi, Cameron Hamm, David Harper-Jones, Paul Hattaway, Theresia Hofer, Tim Hunter, Eric Johnson, Ross Jones, Linda Jordan, Peter Jorgensen, Farzana Khan, Miklos Kontra, M. Lynn Landweer, Karsten Legère, Wayne Leman, Melinda Lyons, Joe McCarthy, John E. McLaughlin, David Miller, Kirk Miller, Sadaf Munshi, Paing Nan, Susanne Neudorf, Angi Williams Ngumbu, Konstanse Raen, Rachel Ruppert, Iris Sacson, Chip Sanders, Hanna Schulz, Glenna Sollenberger, Ming-jyun Syu, Alan Vogel, Kyle von Rueden, Barb Waugh, and Saeed Zubair

And the list could continue with 183 more names of those who made at least one contribution, each of which was significant because it allowed us to publish better information. To all of our contributors we are deeply grateful for we recognize that the success of our efforts depends on their generosity.