add i18n capability

[sseerrggii]

We need a way to keep the selected language in all the page

We probably will do articles in different languages and we want search engines index it properly with html lang atribute

[sauloperez]

What do you want to do here exactly @sseerrggii ? AFAIK keeping the selected language across pages is about using the right locale in the link, meaning that blog should point to /ca/blog I guess.

Then, that thing about search engines is something different. Am I right?

This is a good candidate for the Hacktoberfest as well.

[sseerrggii]

We publish post in three different languages but for the moment we don't translate posts to this three languages. I think for the moment we don't need something like /ca/blog

We can start to define some metadata like "Post language" in Post and use this information to change html lang

[sauloperez]

With the changes done in #31, we have two versions of the blog post for each language: Catalan and Spanish.

If I understood correctly you want instead to show the appropriate lang depending on the post contents, right?

[enricostano]

@sseerrggii is this issue still valid?