From March 15th, 2018 to June 20th, 2018, 50% user give 3-star rating, 50% user give 2-star rating. for Google Country Switch by SearchRank.io chrome extension.
It can be developed further, but it does the trick.
1. It is not permanent. If I open a new tab and do a Google search, I would have to choose a country again. 2. There are only four hard-coded countries.