I have decided to rename some pages and setup a redirection with .htaccess file. How much time (weeks/months/years...) will it take for Google/Yahoo/MSN to update the databases. I'm going to change it because the pages have the same name, even if they are in different languages and I hope this will better the ranking in Google. Thanks (I hope this is the right section for this thread, if not please move it )
When you rename URL's with a .htaccess directive, it depends on how strong your site is before Google updates it's index. Also it will depend on how deep the pages are from the main page.
Thanks for your replies! Pages are like mysite.com/dir/page.htm and Google crawler visit my site every 2-5 days
Also one more thing to note, they won't all update at once. The pages linked from home page will reflect in Google's index first and so on.