Anglosphere
The Anglosphere is the Anglo-American sphere of influence, with a core group of nations that today maintain close political, diplomatic and military co-operation. While the nations included in different sources vary, the Anglosphere is usually not considered to include all countries where English is an official language, so it is not synonymous with the sphere of anglophones, though commonly included nations are those that were formerly part of the British Empire and retained the English language and English Common Law.
https://en.wikipedia.org/wiki/Anglosphere