[NTG-context] Can context automatically italicize foreign words?

Its common convention to italicize words that are of a different language. I've tried marking these words, but then when they also appear in the glossary and index, they are not appearing in the correct placement--somehow the italicized words appear under the "s" category, no matter what letter they start with. Is there any way in ConTeXt to just give it a list of words, and it will italicize them wherever they are found in the text, no matter they are in the body, some index, etc.? --Joel