Rails i18n yes/no translation

Quick tip

keys in yaml are actually yaml content (has reserved words). So, translating things like yes, no, y, n, on or off will silently fail (evaluate to boolean in the key)
So instead of

yes: "si"

do

"yes": "si"

to make sure it's evaluated as a string instead of a boolean.

Full reference card for checking your keys can be found in: http://yaml.org/refcard.html