I guess it depends on who you are asking.

And, since I'm answering, I'll say it was around 14 months that I could understand Kyler. (More than just the one words.) (Obviously NO or MORE were pretty easy!

)
However, I know that I was translating for DH for a while. (Which would be frustrating to me because I felt like he just wasn't paying attention and listening.)
But, then again, I wonder if it's just because I'm with Kyler so much I'm just better at hearing what he's saying.
(That make sense?)
I know for a fact that Kyler and Ryan were the only two in their toddler class that were talking for the longest time.
Even now, the other kids are really just starting.