Sudden surge in vocabulary growth and increased use of single words to convey sentences⁹²

Says approximately 10 words (mostly nouns)²⁶

Expresses wants through pointing and vocalizing²⁶

Reacts to facial expressions⁴¹

Uses exclamations (e.g., uh-oh)⁴¹

Imitates words and also animal sounds⁴¹

Speaks with jargon⁴¹