Why don't you just use CRPG addict's list? It has country of origin IIRC.
I do use it for reference, but it has many problems.
1. I'd say a good half of his list doesn't qualify as RPGs, I cut it down by hundreds within 30 minutes (and that didn't fix the problem when I decided to do a more in depth look at specific years)
2. His list only goes up to ~2013 (Hell, I've done over 60 entries for 2014 alone so far)
3. I've added many games on my own already that aren't on his list, so even if I copy pasted I still need to do a lot of additions myself
4. A large portion of country of origin, developer, year, release date, etc. entries are just straight up incorrect because it's pulled directly from MobyGames. Makes sense considering most games he won't get to for many years, so he doesn't need to care too much. If I'm being conservative, a good 20% of them are straight up incorrect. For example, there was one I just found today that I copied directly from his list which listed an American made game as Russian.
The list I'm doing is also something that I'm creating to a have a lot more functionality than just a to-do list for someone who is going down and playing each one. It's definitely helped me, but I still need to check every single thing there to verify correctness. That doesn't even go into the time it takes to do enough research to confirm if I can count it as an RPG, curated tags, finding country of origin for very obscure games (I've gotten lucky on some and found developers on LinkedIn to ask questions), etc. and adding relavent links/codex threads/formatting for the thread Abu Antar started.