"western sphere" is correct and can be used in written English.
The term is typically used to describe an area of influence or activity of a particular country or organization that is located in the western part of the world. For example, "The US has had significant influence in the western sphere for decades."
A former presidential candidate, Ségolène Royal, said, "France is sending a signal of withdrawal into the Western sphere".
A more spectacular contribution of books, linguistic and didactic competence, and stimulating debates came with an influx of Greek scholars into the Western sphere.
Business executives and diplomats in Azerbaijan maintain that such a succession is the best hope to keep the country in the Western sphere of influence and protect billions of dollars in foreign investment in its rich energy resources.
After postwar Greece ended up in the western sphere of influence, and the civil war ended in communist defeat in 1949, his father lost his job as a tax official in Athens and was jailed.
In addition, although not formulated as aesthetic theories, many cultural traditions outside the Western sphere are concerned with the aesthetics of daily life.
In the Western sphere of the Eurasian continent, the European Union's richest states would be the core, while Turkey and Northern African states are the semi-periphery.
In the West, much of it has been gloomy: some (such as Kerry) see China as muscling-in on "Western spheres of interest"; others worry, opaquely, about how China's human rights record will affect Africa's; and still others warn of "Chinese neo-colonialism'".
These Western and Japanese humiliations sparked the 1900 Boxer Rebellion to expel western spheres of influence.
Here is rebellion in verse, an act of literary guerrilla warfare against "the lines, the forms, the people at the desks, the calling cards, the immigration officer", against a stodgy western literary sphere that too often relegates poetry like hers to the peripheries of acclaim.
The FTI can be adopted across cultural boundaries at least within the Western cultural sphere.
Our positive findings in the Finnish health care provide strong support for the applicability of the FTI in new cultural settings, albeit within the Western cultural sphere.
