Question

If your 13-month-old child uses the title "grandpa" to refer to all older men, she is exhibiting a common language tendency called ____.​

Answer 1

If your 13-month old child uses the title grandpa to refer to all older men, she exhibited a common language tendency called overextension.
When a categorical term is used in language to represent more categories than it actually does this it what we called overextension occurs.