Rename zh to zh-CN, or make a copy for zh-CN

[jung-hunsoo]

As for a popular i18n gem, rails-i18n provides zh-CN, zh-HK, zh-TW, and zh-YUE locales for Chinese languages. And :zh in i18n-country-translations gem seems to be matched with zh-CN.

To rename the locale code or make a copy for zh-CN would be profit for better compatibilities among discrete RoR i18n world.

[fanjieqi]

You could add this to your config/application.rb:
config.i18n.fallbacks = {"zh-CN" => [:zh]}
And the key couldn't be found in the zh-CN.yaml would be found in the zh.yml.