Answer: English is not her first language.
Explanation: In this excerpt from "Daughter of Invention" by Julia Alvarez, what we can infer about the character who is speaking in the passage, based on her nonstandard English speech is that English is not her first language. Laura, the mother of Yoyo is Dominican. She, her husband, and the girls have come to live in the US. She tries to invent things at night. Laura speaks nonstandard English because Spanish is her first language. Although she tries her idioms are all mixed up.