i want firefox in spanish would like to get to install full program for my wife does not speak english
firefox is great but does not have a way to set up other languages in tools or any where else should be a feature that would make it easy to install compleat language change
You can install the full Spanish language (and many other locales) version of Firefox from http://www.mozilla.com/en-US/firefox/all.html
You can install the Quick Locale Switcher add-on to make it easy to switch between locales (language packs and dictionaries)
You can get those language packs and dictionaries from here: https://addons.mozilla.org/en-US/firefox/language-tools/ There doesn't seem to be a language pack for Spanish though.
If you do install a 2nd language of Firefox, make sure you do a custom installation in the first installer screen and put the 2nd version of Firefox in a uniquely named folder, otherwise you will overwrite your en-US version of Firefox.