Sister language

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A sister language is a cognate language, that is, coming from the same once-existing language or hypothetical root language.^[1] There are many examples of sister languages. The major ones are the Romance languages. Each one derives from Latin; though they are all somewhat different, they are not indiscernable linguistically. Italian and French have about 89% lexical overlap; they share 89 percent of the same characteristics and root origins. Both Italian and French have a huge number of similar words. Spanish and Romanian's overlap is lower, about 67%. Spanish has had Arabic influence and Romanian has had many different influences over the years.