Keys with no lettering on them at all. Just a blank top. That way as long as you get one with an ISO layout (vertical enter, 105 keys, etc.) you won't have to find one in a specific language.
I found from geekhacks site that there really is a keyboard that has got Swe/Fin layout, it is the topre realforce, but it has got those really soft swithes 45g and it cost 190€.
Edited by Dezeer - 3/3/10 at 2:22am