Customizing Devise Verbiage
Devise Token Auth ships with intelligent default wording for everything you need. But that doesn't mean you can't make it more awesome. You can override the devise defaults by creating a YAML file at
config/locales/devise.en.yml and assigning whatever custom values you want. For example, to customize the subject line of your devise e-mails, you could do this:
en: devise: mailer: confirmation_instructions: subject: "Please confirm your e-mail address" reset_password_instructions: subject: "Reset password request"