The follow button is generated using Twitter’s own @anywhere code. If you can figure out how to translate that, I’d be happy to try to include it. But at the moment, there doesn’t seem to be any way to do that.
https://dev.twitter.com/docs/anywhere/welcome#follow-buttons
It seems that a javascript localization file is getting loaded when activating the “follow button” widget.
Unfortunately, the text is still in english.
E.G. in the Firebug NET console I can see that my italian site tries to load http://twitter.com/javascripts/i18n/it.js without success (wheel keep spinning), then it seems able to get https://twitter.com/javascripts/i18n/it.js: 207kb but the “reply” content is empty!
If looking at the same address from a new browser tab, one can clearly see that there is a string translation for “Follow %{user} on Twitter”.
According to the Anywhere Dev Group, italian language should be supported, however I could find official docs just for the normal follow button, but nothing about @anywhere localization.
Can you please help me to figure out how I could get the button translated? The same seems to apply also to the “Sign In” button.