What is the deal with this baby?????

Question

SO,,, can the griffins in family guy actually understand what the baby Stewie is saying. ????????

Answer 1

I looked it up on Wikipedia, this is what it said:

Communication with adults

MacFarlane has established a few general rules as to how Stewie communicates with others.

Brian Griffin always understands

    Brian is, as of now, the only main character whose ability to understand Stewie is unambiguous; the two always converse normally. In "Running Mates", Brian briefly appears to hear Stewie's thoughts; this phenomenon has not been explored in subsequent episodes.

In two episodes, another baby by the name of Olivia communicates similarly to Stewie, with the exception that she is taken seriously by adults. Also, Jillian (Brian's girlfriend of several episodes) appears to understand Stewie just as well.

Adults understand, but disregard Stewie

    At the end of the episode "E. Peterbus Unum", the question of whether adults could understand Stewie is raised. In the DVD audio commentary, MacFarlane explains adults can understand him, but don't take him seriously, "sort of like... if a four-year-old who talk told you to '**** off', you'd laugh, because it's cute." In this manner, characters acknowledge Stewie, but pay no mind to his often-insulting addresses, such as calling Peter "the fat man" and referring to Lois by her given name. His insults are occasionally heard, such as when Stewie tells Lois "Why don't you burn in h**l?!" Lois replies, "Well, no dessert for you, young man." Stewie generally is insulting to both Meg and Chris, but does acknowledge them. He also is one of the few characters who calls Meg 'Megan'.

(Wikipedia)

I guess that should explain it.....