How many Wikipedia pages are there on the language of the biwords pair "àbac-xinès"?
àbac refers to word = 'àbac'; xinès refers to word = 'xinès'; Wikipedia pages refer to pages
SELECT COUNT(T1.pages) FROM langs AS T1 INNER JOIN biwords AS T2 ON T1.lid = T2.lid WHERE T2.w1st = ( SELECT wid FROM words WHERE word = 'àbac' ) AND T2.w2nd = ( SELECT wid FROM words WHERE word = 'xinès' )