Hi there, in case you are still looking for help with this, I think this can be accomplished in 2 ways:
1) When using Translations, some languages, such as Arabic and Hebrew, will mirror the questions so they display right to left. Below are screen shots of the same questions in English and then displaying its Hebrew translation:

2) Add the below CSS to your Survey's Look & Feel. The first bit will mirror all the survey content, and the second bit will mirror the buttons:
#SurveyEngineBody {
 direction:rtl !important;
}

#Buttons {
-webkit-transform: scaleX(-1);
  transform: scaleX(-1);
}