The phrase "adopt the manner" is correct and usable in written English.
You can use it when you want to encourage someone to act in a certain way or manner. For example, "Let's adopt the manner of speaking to each other with respect."
She says: "In his soul he is an intelligence agent, but he has been remarkably quick to adopt the manners and rules of the game of big business by becoming a fashionable dandy.
In a year in which the likely presidential opponents, both wealthy Yale-educated scions of patrician New England families, will adopt the manners, costumes and vehicles of what they take to be the Nascar demographic, their masquerade as ordinary guys will tell us no more than their rhetorical dodging and weaving before today's Lawrence Spivak, Tim Russert.
While previous commissions have been largely playful interruptions to the grand Victorian decorum of the square, Gift Horse adopts the manner of official 19th-century public art.
Wide-eyed and pleading in the witness box, he adopted the manner of a schoolboy caught stealing from the tuck shop.
Harappans began producing the indigenous ceramic goods, adopting the manner from the natives.
Answering to his superior, "The Bishop", Unwin is stationed at his vicarage with Matthew Harding – another agent who, when not assisting the Father on missions, adopts the manner of a simple gardener.
In keeping with the instability of identity that goes with modern narcissism, Mavis also adopts different personae as it suits her: at home she plays the dumpy writer in baggy jeans and t-shirts, but when she wants to seduce her old boyfriend she dresses in a low-cut black dress and adopts the manner of a big-city sophisticate.
Ambitious young men during this period, such as George Washington and Alexander Hamilton, adopted the manners of the elite.
Unlike the geese that lived along the canals that passed through nice middle-class environs, these geese had adopted the manners of their cruel human neighbors.
Whenever she confronted an intimate problem, she tended to adopt the public manner of the lecture hall, and use longer and longer words, and make references to books that she thought everyone should have read.
