Langauge report across two .nap files

Produces the following report:

Counter({'eng; CAN, eng; CAN': 166763, 'eng, eng': 1033, 'fra; CAN,
fra; CAN': 318, 'spa, spa': 2, 'iku; CAN, iku; CAN': 2, 'pol, pol': 1,
'por, por': 1, 'chp; CAN, chp; CAN': 1})
Report: How many datasets are bilingual ?

Counter({'unilingual': 116553, 'bilingual': 51568})