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No, the language shown in the images in that tweet is definitely not this one.

It is not a functional language and is obviously quite cheesy in comparison (see someone's comment, in this thread, about it being derived from something called skoomumscript).

SPJ's language is not ready yet.

The code shown in those images is not in the programming language that is being introduced/created now by SPJ. It is clearly a separate (and not functional) scripting project.