List of all nationality values

Is there a list of all possible values for the nationality field (for officers and persons w/ significant control)? We have this link (List of nationalities - GOV.UK) but I wanted to make sure this is up to date and comprehensive? Thanks!

In the past, nationalities weren’t validated, so could be anything.

The list you linked was introduced in late 2017. So while it should be kept up to date and has been updated since then, for formations prior to this time there is no comprehesive list, at least no official one that I know of.