1. A method for analyzing text having words from a plurality of language sources comprising the steps of: generating signals representative of successive letter sequences of a word in the text; forming at least one signal representative of the probability that each of the successive letter sequences corresponds to a particular language source, including; storing a set of signals, each signal corresponding to the probability of occurrence of a prescribed letter sequence in a particular language; addressing said stored probability of occurrence signal responsive to each successive letter sequence; and generating a signal representative of the probability of occurrence of said text word in said particular language responsive to said addressed letter sequence-probability of occurrence signals.