This extension is translations pack for Spree Core.
To fetch latest Spree locale file:
rake spree:i18n:refresh
To update translation to your language:
rake spree:i18n:sync- edit
config/locales/your_lang_code_spree.yml
Remember that you can only edit the values of existing keys, you can't add new ones in these files, b/c they will be removed after syncronization.
To create new translation:
rake spree:i18n:new LOCALE=your_lang_code- edit
config/locales/your_lang_code_spree.yml
To check current translation status:
rake spree:i18n:syncrake spree:i18n:stats