The MS version is out, it was worded differently, more like a group of people are trying to learn the secret of the void century and have been gathering poneglyph "text copies" so they need Robin to decipher them.
I want to believe the group in question is an underworld association just like Gema 66, but with interests in the poneglyphs, and they'll be pretty formidable strength wise.
Or
They will help Robin. I can see a scenario where Robin has access to the poneglyph text copies through them, with the condition that she shares the knowledge with them, meaning the SHs won't have to visit all the important islands in the grandline to know what's on all their respective poneglyphs, and their not following the log pose won't have any significant implications this way.
Edit: @ your second question. Robin isn't related to Wano, she learnt the language on the glyphs back at Ohara, The Oharans studied the poneglyph they had with them for years and finally learnt how to read it