https://developers.facebook.com/apps/{id}/auth
now allows you to specify a Headline, Description, etc. for the authorization dialog that will be shown to users wanting to install your canvas app.
My facebook app needs to support multiple languages.
Is there anyway I can localize these values, since they are hardcoded in the Facebook settings?
Unfortunately not as of yet, from what I can see, do they allow you to have multiple versions of the text for each language. The best you can do currently is to ensure you use the right locale when grabbing the JavaScript SDK, hopefully they will ensure the buttons and other text they control are localized. The Enhanced Auth Dialog is still beta, so there is hope they’ll make it better.