Lexical similarity - Wikipedia
https://en.wikipedia.org/wiki/Lexical_similarityIn linguistics, lexical similarity is a measure of the degree to which the word sets of two given languages are similar. A lexical similarity of 1 (or 100%) would mean a total overlap between vocabularies, whereas 0 means there are no common words. There are different ways to define the lexical similarity and the results vary accordingly. For example, Ethnologue's method of calculation consists in comparing a regionally standardized w…