I reported in an earlier post that there are some gotchas trying to localize an app with the combination of Xcode’s XLIFF export and POEditor.com. The latter stated that it is not their fault and somebody responsible for the former thanked me for my sample.
A future fix in Xcode notwithstanding, I found it necessary to create the Localizable and Main storyboard strings file from the XLIFF files exported from the translation site. This way I could be certain that the translations I care about all all accounted for.