Specifies default mappings for local to remote language codes.
This method can be used in case we know in advance what language codes are used by the remote translator and to which local language codes they correspond.
array An array of local => remote language codes.
Overrides TranslatorPluginBase::getDefaultRemoteLanguagesMappings
public function getDefaultRemoteLanguagesMappings() {
return array(
'en' => 'en-us',
'de' => 'de-ch',
);
}