This boilerplate is has multilinguage capability. To add a new language, go to _config.yml and under "lang" add the desired language. Next, go to _data/translations/ and create a new yml file for the desired language. It is important for all yml files to have the same structure.

You must include the file lang/i18n.liquid to the top of every layout you create.

The yml files inside _data/translations/ contain terms that can be globally used by all pages and layouts. To use these terms, prefix your liquid tag with "t[lang]" followed by the desired path inside your yml translation files.

Multilingual Links

Creating links across multilanguage pages follows the same principle.

Multilingual liquid loop

It is possible your collections contains files of multiple languages. You can filter a collection to get the items of one specific language.

Título do post

Applying links to translated versions of the same page

SEO TIPS

Title Tag

Less than 60 charanters
Add “modifiers" (How to |The current year | Review |Best | Tips | Top |Find | Buy | Easy)
Embed long tail keywords in title tags
Add numbers to your title (9 Important HTML tags for your website to improve your SEO)
Start your title tag with your main targeted keyword
Don’t stuff your keywords
Every page should have a unique title tag

Meta Description

Less than 130 characters (mobile limit)
Add clear Call-to-action (CTA) in your descriptions like Apply today, Check-out, Contact us today etc.
https://www.beacontechnologies.com/blog/2009/12/100-call-to-action-keywords-for-marketing-campaigns.aspx