It is alright, Rin-san. I believe that is simply Archer-san's way of joking! ...But, I appreciate what you have to say.

Something foreign sounds much less worrying! Perhaps it has something to do with this 'code' that makes us... or maybe it's something from our own worlds that makes us different! [He's trying his darnedest to think! He wants to be as helpful a friend to Rin as he can.]