The following discussions should provide some insight into what you are looking for. Like the experts say, there is no magic button that is going to instantly make your website responsive.
I did not quite get the single to a multi-lingual version. Do you want your website created in multiple languages? Again, there is no simple way to do that. I would wait for the experts here to see what they have to say.
I have tried different programmes to make my website multilingual,then I heard about the one,called GTranslate.It's already 9 months that I use it,it really satisfies me.It works perfectly,it's cheap ,and it's easy to apply.it has a 30-day money back guarantee.U do not lose anything,in case of not being satisfied,they will do money back. here is the link
I also use Gtranslate,I like it.I advice you to use it.