What are the characteristics of Labelese?

[ReneZ]

Isn't it natural that labels should consist of a lot of unique words (if they make sense) ? Of course, the author(s) could have "simulated" this property, but I think that's unlikely.

Indeed, if the text of the MS is meaningful, one can expect the label words to be mostly nouns, adjectives or also numbers. They would also be expected to be largely (or even completely) unique.

I consider that the observed behaviour of the labels  is not quite proof that the MS has meaning, but it shows that there is some 'intention' behind it. The text is clearly not just arbitrary filler.