Ehhh. Seems like your standard generic magic object. Reminded me kind of the Fountain of Oui/Eagle Scope combo from Xiaolin Showdown.
Not too sure about if this would do well at all, since:
- There are a ton of things the average person doesn't know. How would someone be able to figure out how this thing works?
- What if someone doesn't have a "main" language? I have several friends who grew up in bilingual households.
- "understanding pictures" can be incredibly subjective. Just take a look at art critics and scholars who disagree on artistic interpretation and intent.
- what if someone generated a "secret message" that was never intended to make sense?
I personally don't really see this doing well as an SCP article, but if you're up for putting in the extra effort and time, consider thinking about why the object exists and not just what it does. What greater significance does it play in the Foundation-verse beyond being just another thing the Foundation has in a locker somewhere?