Language with the most words?

Source

Dictionaries

The size of a language's standard reference dictionary is an important indicator, though again these are not always compiled using using the same criteria. The Second Edition of the 20-volume Complete Oxford English Dictionary contains full entries for 171,476 words in current use. The OED also assumed this number to be an underestimate

there are, at the very least, a quarter of a million distinct English words, excluding inflections, and words from technical and regional vocabulary not covered by the OED, or words not yet added to the published dictionary, of which perhaps 20 per cent are no longer in current use. If distinct senses were counted, the total would probably approach three quarters of a million. source