12,5 years of marriage +the year(s?) she lived here prior to their marriage. But yeah, her Danish is atrocious.
She loathes Denmark but the attention she gets by filling out the job as CPss is something she's depending on as much as the air, she breathes. Take her title away and she's a nobody. And she knows that. I don't know how she'd function if she moved back home to Oz, but she has never become Danish. I think she identifies Denmark as Frederik - and she sure doesn't respect him. He's not very respectable, sure, but she did marry him and it's her job as consort to build him up. We all know how well she does that...
I'm not asking for her to forget that she was born in Australia. It would be unreasonable to expect her to not love Australia or long for friends and family there. It's where she grew up and lived most of her life. I completely get that. But she's supposed to be our CPss and she has yet to convince me that she is Danish now too.
Other 'foreign' princesses and queens also long for the motherland. But most of them adjusted relatively fine in their new land. Especially as they gain a prominent role there, and they are expected to represent their new country.
Maxima really impressed the Dutch by speaking some Dutch at her official engagement announcement. It indicated she already made a lot of effort to learn the language.
Years later Maxima was criticized for saying the Dutch identity does not exist.