language selectors fails for some languages

[forrestguice]

The language selector fails to change the language to Spanish (es-ES) or Traditional Chinese (zh-TW). The resources don't appear to resolve correctly (strings appear in English). It works correctly for the other languages.

I noticed this bug while testing in emulator running api 28. It doesn't occur on my device (api 19). Maybe the resource resolution strategy was changed between versions - the failing languages specify a country code (e.g. ES, TW) while the working languages do not.

Maybe related in some way to #147.

[forrestguice]

Localization is working when the locale is set from System Settings (as opposed to the in-app language selector).