My daughters, now 2 years and 4 months old, talk a lot. They will speak in complete sentences, although their diction is not very clear.
But sometimes, they just say things differently. My favorite is how they say "Come on." Elena says "Koi yan" and Amanda says "Pun". It makes me curious as to how they decided that was "come on." Are they interpreting what they hear differently, or are their mouths not able to make the sounds they intend? Do they really think they are saying "come on?" No matter the reason, it's pretty darn cute.