5. The method of claim 1 , wherein each similarity measure is computed as a function of counts of n-grams of each of a plurality of sizes in the source corpus of the respective domain that are present in the phrase table or multi-model with which the similarity is being computed.
6. The method of claim 5 , wherein each similarity measure may be computed as a function of ( ∏ n = p n = q ⁢ ⁢ match ⁡ ( n | pt , s ) total ⁡ ( n | s ) ) 1 r , where match(n|pt,s) is the count of n-grams of order n in the monolingual source corpus s that exist in a source side of a respective phrase table pt, total(n|s) is the number of n-grams of order n in the source corpus, and p is a first value of n, q is a second value of n higher than p, and r is the total number of values of n used in the computation.