Thank you so much for the help. I'll bookmark that page you linked to.
I'll post a few titles that I can't find in the catalogue. (Sorry about the awful division of paragraphs. The forum seems to add a single blank row after each end of line, no matter what I do.)
SNES, PAL, Nintendo, Zelda: A link to the past
There's a Dutch version, but this is English only.
Game Cube, PAL, Nintendo, Mario Kart Double Dash!!
There's a Dutch version, but this is not it. Does the language refer to the in-game language? Because my games are either in English only, or English + a few major European languages. But the instructions booklet for this game is in Swedish and Danish.
Game Cube, PAL, Nintendo, Zelda: the wind waker
There's a Dutch and several Japanese versions, but this is an English language game with a Swedish manual.
Nintendo DS, Nintendo/Intelligent Systems, Advance Wars Dual Strike
There is a Japanese version, but this game is in English/German/French/Spanish/Italian.
PC, Firaxis, Civilization III
There is an American version. I bought this game in Finland, but computer games aren't region locked like console games, and the language is English only, so should I just add that to my collection? The box art is completely different though.
PC, Maxis/EA, Sim City 4
There is an American version, but my game has English/Swedish in-game and a Swedish manual.
Does country refer to the country of the developer, publisher or distributor? I just remembered that the company Bergsala has (had?) exclusive rights to distribute Nintendo games in Sweden. I don't know if that is helpful or not.