I'm a UK Citizen currently living in the Middle East, the problem is I now have Adobe CC, but the apps have installed with my defults like spelling, dictonary, defult text are set to Arabic styles. How do I change this is one fell swoop to a UK English or International English setup?
For new files, with no files open change the language in the dropdown of the Control panel or character panel, and in the Basic Paragraph style. This will set the default for new work.
Existing files need to be changed individually. In additon to changing the language default with no text selected you can use Find/Change to change the language of exisiting text.