I guess the problem with all things related to accessibility is that there is always a big question about who gets to monetize it...

Not just images of a person doing the sign, but an image associated with the sign itself (a happy face for "happy", a stick person at a desk and at a workbench in a building for "college").

Of course, I learned for a specific context related to including a specific child in activities - I don't know how well that would generalise!

I know Makaton includes images for each sign so that it can be read.

To their credit, the instructor was also very clear that Makaton was not a substitute for BSL. We were taught to use it as a supplement to speech rather than a replacement - to emphasise key words rather than provide a literal translation.

My understanding from the Makaton training I received was that Makaton uses the local sign language, so if you learn Makaton in the UK, you can't necessarily use it in other countries. Of course, I'm relying on the instructor's say-so about that, I've never tried verifying it!