Bit late. But I am likely running Pelagia next week. Here is the cheat sheet I made for myself. Interestingly, we have no idea what 3 of the signs mean. They are not used in the adventure site and I don't know where else to find them. Players don't look at this. Spoilers. It's for GMs.
The runes missing a definition on the cheatsheet appear to mean:
* Spiral rune means "Rope"
* Box with a slash means "Sleep"
* horizontal S with a line through it means "pull/drag"