Modular metadata description on language

Hello,
I need to change the metadata description of a modular page depending on the language.

Could someone please explain how to do it?

Im new here but I think you can add the language key behind the module name like default.EN.md and need to set the language in the page header.
---twig
template: default.EN

So it will search for a `default.EN.html.twig` in your templates folder. 
There is also an other way with twig translation, but I did not understand it yet.

Here in the docs its better explained [Multi-Language](http://learn.getgrav.org/content/multi-language#language-based-twig-templates)

Thanks for your answer, I've tried again, now it works:

• removed metadata: description: from site.yaml
• renamed modular.md into modular.en.md
• added metadata: description: to modular.en.md
• copied modular.en.md to modular.it.md and changed the description

Probably looking for more complicate solutions messed up something.