Thanks for your response. Using a translation plugin for such a small language problem seems to me not to be the right solution. We are talking about a FACEBOOK plugin and there must be a way to change the language setting direcly in the plugin, probably by changing a line of code in of the file. I found one user of the Theme (see this topic) saying he manages to solve the problem:
Yeah, ive changed a line of code in the plugin. Exactly:
/functions/output.php >> line 59 >> js.src = "//connect.facebook.net/**es_ES**/sdk.js";
I did however not manage to do the same as the code seems to be different in my file (strange, I know).
I also found another solution in this topic of the forum. But it did not work either.
Any help would be greatly appreciated as there must be a way to make it works in other language than english.