A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
There is a couple of incorrect country codes (corresponding to ISO 3166-1) in your dictionary. For example, for Greek and SerboCroatian language....
Yes, it is. I've just added smcs.rsp to project containing one #define and it works.