Change the default geocoding language

[alulsh]

Currently, calls to the Mapbox Geocoding API don't set the default language. The language is likely defaulting to English if not set. If your family tree includes a lot of place names in another language (e.g. France, Germany, Italy, etc.) then this may reduce the relevancy of your results.

You should be able to select a default language to improve the relevancy of your mapped results. The Mapbox Geocoding API supports multiple languages, so you could even provide multiple preferred geocoding languages. A package like https://github.com/sozialhelden/ietf-language-tags could validate the language codes you provide.