When you create a multi-lingual survey, FluidSurveys will create just as many URLs as you have languages for the survey. This way, when you send out an invite to people who speak French, the link you send them will take them to the French version of the survey. Although you will have as many deployment URLs as you will have languages for the survey, you don’t have to use all of them. Generally, a respondent can start from the first page of the survey and then choose which language he/she would like to take the survey in.
Watch this video on customizing your URL: