Rainlab Translate plugin yaml language files

Need Help
#1

October ver: 3
Rainlab translate ver: 2.2.1

I don’t get how to use the language yaml files for static content with the rainlab translate plugin.
following the documentation in the theme yaml file I have to add something like:

translate: 
  en:
      home:
          description: "We provide the best services."
  fr:
      home:
          description: "Nous offrons les meilleurs services."

but what I have to put in the page I want the translation?

I tried something like

<p class="lead">{{ home.description|_ }}</p>

but it doesn’t works.

the classic translation system with text translation works fine:

{{ 'some text to translate'|_ }}

but I would like to move all the translations in specific files