motherese, n.

A simplified form of language used (esp. by mothers) in speaking to babies and young children, characterized by repetition, simple sentence structure, limited vocabulary, onomatopoeia, and expressive intonation; child-directed speech; ‘baby talk’.

For My Brother

Thank Gosh Ma hadn't the powerness

To hire for us a sitter or a governess.

When a mother is affluent,

Her motherese ain't fluent.