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This project is a ruby implementation of ISO 639-1 alpha2 and ISO 3166-1. It includes definitions of all two letter language and region codes.

Languages

Languages are defined by ISO 639-1 alpha-2; that is the 2 letter lowercase language code.

These have been augmented to contain the plural rule names and the language's direction.

> ISO::Language.find('ru')

=> #<ISO::Language:0x007fe2ba43db50
		@plural_rule_names=["one", "few", "many", "other"],
		@direction="ltr",
		@code="ru",
		@name="Russian">

Regions

Regions are defined by ISO 3166-1; that is the 2 letter uppercase region code.

> ISO::Region.find('MX')

=> #<ISO::Region:0x007fe2ba070e50
		@code="MX",
		@name="Mexico">

Regions can also be defined by the UN M49 standard; that is the 3 digit region code.

> ISO::UN::Region.find('419')

=> #<ISO::Region:0x007fe2ba43db50
		@code="419",
		@name="Latin America and the Caribbean">

Tags

The combination of a language and a region is called a Tag :

> ISO::Tag.new('pt-BR')

 => #<ISO::Tag:0x007fe2bb005b90 @code="pt-BR",
 	 	@language=#<ISO::Language:0x007fe2ba256918
 			@plural_rule_names=["one", "other"],
		  	@direction="ltr",
	  		@code="pt",
  			@name="Portuguese">,
 		@region=#<ISO::Region:0x007fe2ba412e28
			@code="BR",
			@name="Brazil">>

You can check if a Tag is valid like so :

> ISO::Tag.new('pt-BR').valid? => true
> ISO::Tag.new('lolcat').valid? => false

I18n

Language and region names are internationalized - contribute to the I18n project directly on Locale for any changes.