Most languages have words that function as negative polarity items. Is this believed to be true of all human languages? Are there specific languages that have been plausibly claimed not to have any negative polarity items?
Most languages I know have something like NPIs, though there is less use for at least some of them in languages like French or Yiddish that use Negative Concord.
The bibliography in this article may help, especially van der Wouden 1996, Horn and Kato 2000, and Zeijlstra, Hedde, and Soehn 2007.