hi kiddo...
what i think is going on is what a few of our birds do with some of us is like ..when i go to put cappy to bed he will jump on the front of the cage bars and wait for me to nuzzle him and kiss his beak and feet and fuss over him...tell him goodnite and a few other loving things he recognizes and he twitters an sort of does lil noises like a mate would do to each other when showing love and trust...he will let me rub nose to beak and does what your describing. Mates will do this also when preening each other.
so i think where females "not all but mostly all" dont talk or say but just a few words is she is showing her affection and trust of you which in itself from a female bird is HUGE...believe me on that one...
what she is doing is when you talk to her is acknowledging you by sort of saying ..."i love you too" and "i love being with you because i can trust you"...like i said...THATS HUGE...most females are very standoffish...
however, seeing how she is doing that...i think she MAYBE wanting to learn the language and if you keep talking very slowly and cleary when you do speak to her with saying only one two word phrase over n over ...she just may as yet learn to say those words...because she certainly is letting you know ..she thinks of you as a BONDED MATE. In short you have accomplished what many have not with her...so be very very proud of yourself AND her.
dont be discouraged you have done wonders to accomplish this from her...

and IF she never talks...i cant tell you enough how proud you should be that she is THAT comfortable with you and does this for you ...so you will have to accept that and know..for her...she is letting you know this is the best she has to give you in a BIG way...
but keep trying as you never know...when she does talk it will be OMG and wont be any doubt only shock that YOU DID HEAR WHAT YOU HEARD giggle...

im still trying to get Cappy to do what a lot of other birds will do for their keepers which he did only when he was a wee baby and i first brought him home...and thats...let me touch and sorta touch his head like a mate does when preening...he has had on a couple occasions a rough time where i HAD to handle him and of course as we all know keets are not fond of grasping situations...so i think thats why he stopped letting me do that...but in every other way...he is a joy and shows trust in different ways...he just isnt the acrobatic clown that some have with their birds or doesnt get into cute little mischief situations like most other birds either...other than trying to fly into my fridge when i open the door cuz he knows thats where the goodies come from
so essentially i call him boring...giggle..and delight in listening to others tell their stories of their keets when they become lil rascals..

he is a real chatter box tho for sure and says a ton of different things...and can crack me up when he says certain things at just the right moment...
you...got yourself a wonderful wonderful female...and like i said...be really proud of what you have accomplished to get that from her...ill say it again ...ITS HUGE...
im sorry for this long post but im really impressed..this shows how much gentleness and patience you have given to her and not pushed her and let things go at her pace and have now won her over TOTALLY into what would be a female showing submissive behavior to a mate. It also has helped that she is THE ONLY bird you have to get this from her and what many should learn ...they are not bored or lonely and dont need another bird to make them happy...just lots of toys a large cage and someone like you...
