How can automatic posting to Facebook be disabled for some posts?

We’re running your Facebook plug-in in our WordPress to post our news/blog posts to our Facebook page, but we’re also using a multilingual plug-in to translate our posts. When a post goes up, the Facebook plug-in posts both the real post and the translation to the Facebook page, which produces extra clutter on the Facebook page that needs manual deleting. How can we disable the plug-in from posting certain posts (like our translations)?