Yes, wog is a bad word here too, but when we say Wagga Wagga we are probably seeing the spelling as we say it, if that makes sense.

There was a very funny tv show called Acropolis Now, which was a spin off from a play called Wogs Out of Work. All of the cast were Australians with non-Anglo-Celtic background. It was one of the funniest shows on tv. Most Aussies of all kinds love to laugh at ourselves, so the word 'wog' in that show was a turnaround on all the negative connotations.

I've seen that Worcestershire sauce moment a few times on American tv. When I see the distinctive bottle in the hands of a cook or chef I wait for that moment when they try to pronounce it. Although, I think the common pronunciation in Oz is Woo-stuh-sheer, Less-tuh-sheer etc.