国际语（Interlingua）是创立于1951年的国际辅助语言。

国际语又被称为新拉丁语，它的单词来自于英语、法语、意大利语和西班牙语/葡萄牙语。这些语言和拉丁语相同的单词很多。比如：abbreviation, abdication, abduction, abjuration, abolition, abomination, aborigines, absolute, absorption, abstention, abstraction, acacia，这些单词在这四种语言里一样或近似，所以国际语里也一样。

Interlingua (/ɪntərˈlɪŋɡwə/; ISO 639 language codes ia, ina) is an international auxiliary language (IAL), developed between 1937 and 1951 by the International Auxiliary Language Association (IALA). It ranks among the top most widely used IALs (along with Esperanto and Ido), and is the most widely used naturalistic IAL: in other words, its vocabulary, grammar and other characteristics are derived from natural languages. Interlingua was developed to combine a simple, mostly regular grammar with a vocabulary common to the widest possible range of languages, making it unusually easy to learn, at least for those whose native languages were sources of Interlingua's vocabulary and grammar. Conversely, it is used as a rapid introduction to many natural languages. Interlingua literature maintains that (written) Interlingua is comprehensible to the hundreds of millions of people who speak a Romance language, though it is actively spoken by only a few hundred.