Fallback to language only localization

Current localization is to specific.  French speakers living in France don't get the current translation.  German speakers from Switzerland don't get the current translation.

This pull request:

1. Adds a fallback to check for a langauge-only localization.

2. Makes all current localizations language-only.

In the future we should default to language-only, and add country-specific localizations only when required.