Fallback to regionless locale matching and make our existing translation IDs regionless. This makes it much more likely that a Spanish translation will be used without depending on the browser to setup navigator.languages exactly as we expect. I tested this in Chrome overriding navigator.languages to ['es-MX'] and it DTRT.
Fallback to regionless locale matching and make our existing translation IDs regionless. This makes it much more likely that a Spanish translation will be used without depending on the browser to setup
navigator.languagesexactly as we expect. I tested this in Chrome overridingnavigator.languagesto['es-MX']and it DTRT.Fixes: #893