How to output a translation to a page from a file?

Question

Ruby on Rails

My ru.yml file

ru:
  hello: "Привет"

<%= t :hello %>
Need something like this

ru:
  nav:
    hello: "Привет"

and output how? does not work. Tell
<%= t :nav:hello %>

Answer 1

<%= t('nav.hello') %>
or is it easier
<%= t(:hello) %>