Adding French to Metadecidim / La mise à disposition du français sur Metadecidim

Is your feature request related to a problem? Please describe.
As a bilingual, diverse, country, we look for opportunities to prevent the normalization of English in our operations in a way that excludes minority languages. It's possibly similar to the situation of Spanish and Catalan.

Describe the solution you'd like
For French, and possibly other languages, to be added as options to metadecidim. We were particularly impressed by NYC showing off the language capabilities of decidim in their instance, as per the graphic attached.

Does this issue could impact on users private data?
No