How English Has Become A Common Language.....
1).Historical Reasonshttps://www.thehistoryofenglish.com/issues_global.html
2).Political Reasonshttp://historialenguainglesa.blogspot.com/2013/01/the-spread-of-english-across-globe.html
3).External Economic Reasons
4)Intellectual Reasons
5)Entertainment Reasons
LANGUAGE STANDARDIZATION
Language standardization is the process by which conventional forms of a languageare established and maintained.
Standardization may occur as a natural development of a language in a speech community or as an effort by members of a community to impose one dialect or variety as a standard.
The term re-standardization refers to the ways in which a language may be reshaped by its speakers and writers.https://blogs.ntu.edu.sg/hss-language-evolution/wiki/chapter-11/