Language Development By clr0444 Period: Jan 1, 2012 to Jan 1, 2013 Language Development May 1, 2012 Babbling Between 4 and 6 months, an infant will start to babble. Aug 1, 2012 Two syllable sounds An infant will start to make two syllable sounds such as mama and dada. Nov 1, 2012 First word Around 10 months, an infant will say their first word. Jan 1, 2013 3-5 words By a year, most children can speak 3-5 words.