Does the keys in internationalisation rails behaves different if they are of different case

Question

The example is from rails docs:

en:
 hello: "Hello world"

Are the both different. Does the case of the keys matters?

en:
 Hello: "Hello world"

Answer 1

Yes, case of the keys matters.

check example,

define variables in en.yml

en:
  hello: "hello world"
  Hello: "HELLO WORLD"

and access it from console as

2.2.1 :001 > I18n.t('hello')
 => "hello world" 
2.2.1 :002 > I18n.t('Hello')
 => "HELLO WORLD" 

Please check Rails Internationalization