I have one Domain name. The page opens and the option asks what language would you like to view the website in? (English or French)

Question 1) I have two distinctly seperate web files, one in English and one in French. How to I label each? indexfr.htm & indexen.htm?

Question 2) How do I redirect from the main page to either the English or French files?

FYI: These are Flash Webpages.

Your assistance is much appreciated!