Some kinds of homonyms are spelled the (about) same but pronounced differently. When the pronunciation is the difference, it’s important.
We match the Italian pronunciation fairly closely, but not the French. The French pronunciation is something like “wah-la,” accent on the second syllable. It’s more fun if you go find someone who’s French and ask them to pronounce it for you. The spellings “voila” and “viola” are part of the humor, by the way.