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Internationalization (i18n) library for Ruby

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Ruby I18n

Ruby Internationalization and localization solution.


  • translation and localization
  • interpolation of values to translations (Ruby 1.9 compatible syntax)
  • pluralization (CLDR compatible)
  • flexible defaults
  • bulk lookup
  • lambdas as translation data
  • custom key/scope separator
  • custom exception handlers
  • extensible architecture with a swappable backend

Experimental, pluggable features:

  • lambda pluralizers stored as translation data
  • RFC4647 compliant locale fallbacks (with optional RFC4646 locale validation)
  • backend cache

For more information and lots of resources see:


gem install i18n



MIT License. See the included MIT-LICENCE file.

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