Hi Happyincolombia,
Sorry about the delay of our response, Bing Translator on Facebook will show up automatically for posts that are not in any of the languages you listed as knowing within
your profile (and are supported by Bing Translator). Sometimes, if the language detection fails. it might not show up even if the post is in another language. This is especially true for shorter sentences. Hope that this is helpful. Thanks. Microsoft
Translator Team