Jetpack Twitter Via

This plugin needs Jetpack by WordPress.com to be activated and its Sharing module to be enabled.
Enter the desired Twitter usernamen in Settings -> Sharing. It will then be appended, every time a visitor shares your content on Twitter

See the Tweet Button documentation for details.

Translations

I will be more than happy to update the plugin with new locales, as soon as I receive them!
Currently available in:

• English