Final answer:
Aunt Emily's comment about gluing tongues back on refers to the process of language recovery and revitalization, which is important for Indigenous cultures to maintain their knowledge and cultural identities.
Step-by-step explanation:
Aunt Emily's comment about gluing their tongues back on and waiting for the nerves to grow back can be interpreted as metaphorical language referring to the process of language recovery and revitalization. This process is important for Indigenous cultures to maintain their knowledge, cultural identities, and tribal connection. It involves efforts to restore, preserve, stabilize, and teach Indigenous languages to the next generations.