I mistakenly chose a foreign language on my camera and want to change it back to English. How do I do this.

Press the Menu button. Select Setup (the wrench icon, or else the last item). Select Language (either the waving flag icon, or else "xxx/Language" where xxx is Language in whatever language is currently selected. No matter the language, it should still say "Language" in English after the slash. In that menu, each language is labeled in that language, so you should see "English" as one of the options. Select that, and everything should be back in English.