Yes, I did that. Everywhere I could find a language choice it said English (US), and I picked another language and then reselected EnglishUS. Still the Spanish type keyboard. But I just solved the problem! Even though the Language choice in International Preferences is English, that is apparently overridden by the language selector at the right top of the screen. The one with the flag. Sure enough the Spanish flag was displayed. I changed it to the US flag and the keyboard is back to normal.
Also, in Pogue's "Missing Manual" for Leopard, he said there was a Keyboard Viewer selection from the flag dropdown menu, but there was not one on mine. After messing around I discovered that if you go to the International pref, then Input Menu, you have to check the box for Keyboard Viewer for it to show up. I had been hunting for that viewer and finally found it.
Thanks for the suggestion, Tom. You were close. But I still wonder why there is no Keyboard changing button in my Keyboard and Mouse pref. Pogue doesn't mention one either.