Can't get the "Facebook Subscribe" code to work
The code I tried using can be displayed from the following url: http://www.thebrazilianlanguage.com/test/test.htm. I can get the Facebook Comments widget to work, but not the Subscribe button
You're pointing the Subscribe button at a Facebook Page.
According to The Subscribe Button Documentation the href param must point to a user profile:
href - profile URL of the user to subscribe to. This must be a facebook.com profile URL.