The phrase "a familiar milieu" is correct and usable in written English.
It can be used to describe an environment or setting that is well-known or comfortable to someone.
Example: "After years of traveling, she finally returned to a familiar milieu that reminded her of her childhood."
Alternatives: "a known environment" or "a comfortable setting".
"Ghosts" starts off in a familiar milieu.
For others, especially new immigrants, the game is a familiar milieu in an inscrutable city.
New Jersey mobsters were a familiar milieu when "The Sopranos" began, and so was the frontier setting of "Deadwood".
Walpole was also in a familiar milieu: the unvarnished working countryside rarely seen in films, or by visitors to Norfolk.
The very best of the sequels attempted by the Pixar studio manage to combine a familiar milieu with the opportunity to explore entirely different themes to the original films.
Master of None is set in New York where Ansari lives, and it's a familiar milieu of navel-gazing coffee bar habitués that we've seen before in Girls, Bored to Death and even Louie, the sitcom made by Ansari's fellow standup and former colleague on Parks and Recreation Louis CK.
Their authors root their familiar plots in an authentically recreated British underworld: in the first, an ambitious criminal spreads his tentacles across the city to establish his power, in the other a disoriented ex-convict is released into a once familiar milieu he no longer recognises.
Banlieue cinema, casting a spotlight on France's racial and social tensions – and, above all, depicting life way beyond the familiar milieu of the Left Bank bourgeoisie – was a broad chapel, running from gang movies (the punningly titled Ma 6-T va crack-er – My cité's gonna crack) to high-school realism (Abdellatif Kechiche's 2003 debut L'esquive).
We are, that is, in the familiar milieu of affluent American phoniness, which has served as a scapegoat in a half-century's worth of movies from "All That Heaven Allows" to "The Graduate" to "American Beauty".
Dear P.A., A: While his actions are clearly unacceptable, he may not know it; they could be more acceptable in his familiar milieu.
Over the years my guilt diminished and I returned to the more familiar milieu of built-up places, of buildings that lean into each other, light falling sharply on darkened alleyways, avenues that flow with the slow grace of rivers.
