You can easily display Twitter’s follow button in your own language using a sidebar widget in your WordPress based website. Twitter Follow Button for WordPress is a free WordPress plugin that allows you to display Twitter Follow button in various languages (English, French, German, Italian, Japanese, Korean, Russian, Spanish, Turkish) easily.
Simply install and activate the plugin Twitter Follow Button for WordPress. After activation visit Dashboard -> Appearance -> Widgets page and drag its widget to your sidebar and select the options.