Tapping into non-English-language science for the conservation of global biodiversity
Authors: Amano Tatsuya , Berdejo-Espinola Violeta , Christie Alec P. , Willott Kate , Akasaka Munemitsu , Báldi András , Berthinussen Anna , Bertolino Sandro , Bladon Andrew J. , Chen Min , Choi Chang-Yong , Bou Dagher Kharrat Magda , de Oliveira Luis G. , Farhat Perla , Golivets Marina , Hidalgo Aranzamendi Nataly , Jantke Kerstin , Kajzer-Bonk Joanna , Kemahlı Aytekin M. Çisel , Khorozyan Igor , Kito Kensuke , Konno Ko , Lin Da-Li , Littlewood Nick , Liu Yang , Liu Yifan , Loretto Matthias-Claudio , Marconi Valentina , Martin Philip A. , Morgan William H. , Narváez-Gómez Juan P. , Negret Pablo Jose , Nourani Elham , Ochoa Quintero Jose M. , Ockendon Nancy , Oh Rachel Rui Ying , Petrovan Silviu O. , Piovezan-Borges Ana C. , Pollet Ingrid L. , Ramos Danielle L. , Reboredo Segovia Ana L. , Rivera-Villanueva A. Nayelli , Rocha Ricardo , Rouyer Marie-Morgane , Sainsbury Katherine A. , Schuster Richard , Schwab Dominik , Şekercioğlu Çağan H. , Seo Hae-Min , Shackelford Gorm , Shinoda Yushin , Smith Rebecca K. , Tao Shan-dar , Tsai Ming-shan , Tyler Elizabeth H. M. , Vajna Flóra , Valdebenito José Osvaldo , Vozykova Svetlana , Waryszak Paweł , Zamora-Gutierrez Veronica , Zenni Rafael D. , Zhou Wenjun , Sutherland William J. 
Published: October 2021

The widely held assumption that any important scientific information would be available in English underlies the underuse of non-English-language science across disciplines. However, non-English-language science is expected to bring unique and valuable scientific information, especially in disciplines where the evidence is patchy, and for emergent issues where synthesising available evidence is an urgent challenge. Yet such contribution of non-English-language science to scientific communities and the application of science is rarely quantified. Here, we show that non-English-language studies provide crucial evidence for informing global biodiversity conservation. By screening 419,679 peer-reviewed papers in 16 languages, we identified 1,234 non-English-language studies providing evidence on the effectiveness of biodiversity conservation interventions, compared to 4,412 English-language studies identified with the same criteria. Relevant non-English-language studies are being published at an increasing rate in 6 out of the 12 languages where there were a sufficient number of relevant studies. Incorporating non-English-language studies can expand the geographical coverage (i.e., the number of 2° × 2° grid cells with relevant studies) of English-language evidence by 12% to 25%, especially in biodiverse regions, and taxonomic coverage (i.e., the number of species covered by the relevant studies) by 5% to 32%, although they do tend to be based on less robust study designs. Our results show that synthesising non-English-language studies is key to overcoming the widespread lack of local, context-dependent evidence and facilitating evidence-based conservation globally. We urge wider disciplines to rigorously reassess the untapped potential of non-English-language science in informing decisions to address other global challenges.

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