TR_m2_Francine_Kington sends the player to Marog, but fails to mention where exactly it is.

I suggest adding ShowMap "Marog" to her dialogue entry for the town "The way to Marog is long, and, frankly, I don't know it well. I traveled by ship and by silt strider to Akamora. If you prefer to go by foot, all I can tell you is that you will have to leave the town to the west and walk to the coast, there you turn northward and follow the road to Marog."