I do agree, going to reference Nintendos system for using regions for Nintendo Network IDs.
The regions you could pick from would be: South West (Cornwall, Devon, Somerset, Gloucestershire etc), South East (London, Kent etc), North West (Greater Manchester, Liverpool etc), North East (Yorkshire, Lincolnshire etc), Channel Islands, South Wales (Cardiff, Pembrokeshire etc), North Wales and Scotland.
This is the official name for Russia, which wouldn’t be a problem, but you refer to other countries by their common name like ‘United States’ rather than ’ " " of America’, ‘China’ rather than ‘People’s Republic of China’, and ‘Taiwan’ rather than ‘Republic of China’. So I believe this deserves some attention.