why does my firefox start page keep opening in a foreign language, no matter how many times i have uninstalled and reinstalled the US English version? also, why is it so slow to open, if it opens at all now?

it wants me to believe it's opening in Spanish, but that is not the language that appears on the start page, looks like it might be German? also, since i have reinstalled, mozilla/firefox is extremely slow to open, if, in fact, it opens at all. if i stop the process, and then proceed to open something else via the toolbar, i.e., aol mail, etc., i get to where i need to be.