A .strings value may span several physical lines, so deleting such an
entry line by line leaves orphaned lines that the parser folds into the
preceding value. Every key behind that point then disappears at runtime
while plutil -lint still reports OK. Tab titles are looked up without a
defaultValue:, so the tab bar rendered raw keys like "tab.overview"
while the rest of the UI fell back to its English defaults.
LocalizationIntegrityTests parses each table out of the app bundle and
fails on multi-line values, on missing keys that have no fallback, and
on leftover cable.pro.* entries. LocalizedTabBarUITests launches the app
in German and asserts the tab bar is translated.