Assert the language chooser of the page offers (or does not offer) a language, by the name the site shows.
Examples
Then the language chooser should offer "Deutsch"
Then the language chooser should offer "English"
And the language chooser should not offer "Français"
Then the language chooser should list "Deutsch"
But the language chooser should not list "Italiano"
Pattern
Then(/^the language chooser should( not)* (?:offer|list) "([^"]*)"$/, …)
Part of @webship-js/django-cms-steps (github.com/webship/django-cms-steps), a step pack for Webship-js 2.0.x.