If language selection is supported by a website, I recommend offering a connect to the choice on each and every single page. Users typically go straight to pages from search services or bookmarks without passing through the web page. Some websites set up a language option page before the user can reach the web page. I suggest against this if it is possible to identify a default language that will certainly be made use of by a huge percentage of the users. Clicks and download time can be saved by going directly to a page for the primary language as long as the web page has a very popular (and worldwide understood) entry for language modification. The pages for the different languages should have their URLs so that users can bookmark the proper entry point and bypass language choice if they check out once again.
In summary, the recommendation is that you target sections of the site to consumers in particular markets along with providing that material in a variety of languages. site.com/fr would be targeted towards French users, and the default language would be French. The user should have the ability to change the language of this sub-folder to English and preferably some other European languages also.
Presuming all your sub-folders remain in different languages the site ought to have no replicate content concerns.
The problem of replicate content arises when a site has site.com, site.com/uk and site.com/au for the United States, UK, and Australia. All of these remain in English, so the material is most likely to be similar. Another concern that can trigger replicate material is when you translate sub-folders such as site.com/fr into English.