Domestic and International Common Language Database (DICL)

The database contains index measures of linguistic similarity both domestically and internationally. The domestic measures capture linguistic similarities present among populations within a single country while the international indexes capture language similarities between two different countries. The 8 indices reflect three different aspects of language: common official languages, common native and acquired spoken languages, and linguistic proximity across different languages. This database has many uses, such as in models of bilateral flows—including FDI, migration, and international trade—as well as in regional or country level analyses.
Extensive and detailed coverage:

Bilateral indexes for 242 countries
Based on 6,674 individual languages

本数据库涵盖国内与国际两类语言相似度指数测度指标。其中国内测度指标用于刻画单一国家境内不同人群间的语言相似度，国际指数则用于衡量两国之间的语言相似度。该8项指数涵盖语言相似度的三类维度：通用官方语言、通用母语与习得口语，以及不同语言间的语言亲疏度。本数据库具备多类应用场景，例如可用于双边流动模型（涵盖外商直接投资（Foreign Direct Investment, FDI）、人口迁移及国际贸易），亦可用于区域或国家层面的分析研究。
覆盖范围广泛且细致：
覆盖242个国家的双边指数
基于6674种独立语言构建