Georgina's speech is very confusing and rarely makes sense. she makes funny faces and is often heard giggling. georgina exhibits schizophrenia.

I believe the answer is: disorganized schizophrenia

Disorganized schizophrenia is characterized by a disrupted train of thought that could make the victim to connect the idea on their mind with the proper sentence that can make the audience identify the meaning.
It is also very common for victim of disorganized schizophrenia to suddenly display inappropriate emotions without any trigger