Tested with RHL 8.0 and using sv_SE.UTF-8. The first parts of the locations in the time zone tab show up translated into Swedish, but not the additional strings such as for example "most locations" and "Alaska Time - west Alaska" as shown in the screenshot.
Created attachment 79715 [details] Screenshot showing one of the only partially translated locations
Hmm, the comments are coming from /usr/share/zoneinfo/zone.tab, which is part of glibc-common. Translating that part will be difficult. I'd rather trash the whole thing. I think that the timezone stuff should be rewritten so that the user simply picks their timezone rather than the nearest city. For example, why should a user in Miami, Florida have to pick New York instead of Eastern Time Zone. I think Windows has a much more elegant solution to this. I'm going to mark this bug as 'wontfix' and instead try to find the time to write a better timezone selector.