Abstract
Since the end of World War II, the English language has become the lingua franca of science publications worldwide. Science publications written in other languages do not gain the same exposure to the international scientific community as does the material in English. In this sense, nonβEnglish articles constitute an βinvisible scienceβ for the rest of the scientific world. This study compares publications indexed in the academicβoriented Hebrew Index of Periodicals (IHP) database with those in the Science Citation Index Expanded (SCIE) in order to document the amount of scientific material published in Israel, where Hebrew is the native language. Except for abstracts, which are sometimes given in English, as well as Hebrew, and therefore provide some idea of a paper's content, most of this research remains hidden from the international scientific community. The SCIE and IHP databases for our examination cover the three grand disciplines: the exact and life sciences, the social sciences, and the humanities. Additionally, the study probes the coverage of medical publications in the two databases. The difference between old and emerging disciplines in the use of a language other than Hebrew is observed and nonβEnglish citation patterns for various disciplines are examined. The results confirm the dominance of English as the lingua franca of science and point to the large number of scientific studies in Hebrew that lack international exposure.