As a user, I want to see pages in a language that I can understand.
Steps:
use I18n module to set English as a default locale and add Bulgarian as one of the possible locales
create yml files with translations in config/locales (en & bulgarian, and remember that devise has separate translation files (and it has examples in many languages in its repo)
change all string occurrences to the pointers to translations using translate() or t() helper
As a user, I want to see pages in a language that I can understand. Steps:
Use https://guides.rubyonrails.org/i18n.html