Fire and community. Cave paintings have been mentioned, and they have a rather decent language though words are often used in combination to create other words.
Rain - Water From Sky
River - Winding Water
Ocean - Big Water
Get creative. Based on the climate, they used animals skins and pelt foe rudimentary clothing. Groups of humans range from as few at ten to as many as eighty. It's still early population numbers. Diet is still hunter gatherer, and they hunt with spears but my.next post has Ely introducing bows to them. The greatest threats atm to the humans are bears and mountain lions.
Ely is very active with all of them though, visiting each group from time to time. She participates in the hunts, the gathering, the cooking, the tanning, even the nurturing of children. She is seen as a good spirit by the humans and to speak ill of her to others or to act against is believed to being bad fortune on the tribe. She'll stay for a few weeks before moving onto the next group.
Two tribes could be in pitched battle, and the moment Ely set foot into view they would freeze, winner and loser, lest any harm came to her. She will never say anything against the fighting or make move to stop it, or support one side over another.
Logos is essentially unknown to them.