"German" or "German_Germany" or "DEU", but not "de" or "de_DE". We need
to convert the names from the form with ISO 639 language code and ISO 3166
country code to the form with English names or with three-letter identifier.
"German" or "German_Germany" or "DEU", but not "de" or "de_DE". We need
to convert the names from the form with ISO 639 language code and ISO 3166
country code to the form with English names or with three-letter identifier.