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There is a TV series called Shameless that has an American version and British version. Should both of them have the same tag called shameless? Or should they have separate tags like shameless-us and shameless-uk ?
As @wbogacz says in the comments; use common sense. If your question is about the UK version, tag it with that.
Similarly with the US version.
The same goes for 'reboot' series that share a name. For example: friday-the-13th is about the original wheras friday-the-13th-2009 is about the reboot.