Here's what I did:
I talked to tiny girl and the druid without talking to Rynt. That way the quest "talk to 3 important people in Terrinyo" was not completed.
I went on to explore the rest of the world, getting to dwarftown at some point and starting both the portal quest and regular dwarven quest line.
After completing the first quest and dealing with Nonnak & Griff, I returned, got my inventory identified, level pulled and the new quest - animated forest.
I returned to Terrinyo, talked to the elder, got assigned a quest to find CoC and went straight there.
Upon entering, I got information that I have completed the animated forest quest, even though I have never descended past dwarftown.
After that, Thrundarr gave me the ogre tribe quest as if I did the AF.
I guess that's not how it should work, the Terrinyo quest should be marked as done instead of a dwarven quest.

I can provide the save file if it's needed.