Update before i18n structure
Prepare for i18n
Update translatable entities
update i18n
Update kernel for i18n + update base twig to switch language
Php cs fixer
Update phpdoc
Update for phpcs
update view
Update render_block & render_menu methods about i18n
Update render_menu method about i18n
add locale listener
Update for W3C validation
Use annotations instead of YAML doctrine format & validations