I enabled the Translator service in my config.yml, cleared cache and installed assets using the command line interface.
My login page still says "security.login.submit". I am using a custom template, which is located in: app/Resources/FOSUserBundle/views/Security/login.html.twig
and contains (copied from the FOS provided template):
{{ 'security.login.submit'|trans }}
My config.yml:
framework:
translator: { fallback: "%locale%" }
default_locale: "%locale%"
parameters.yml:
parameters:
locale: en