There are a few ways to access view helpers from the Rails console. The easiest way is the helper shortcut:

helper.translate 'i18n.string'
helper.your_helper_method

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If the desired helper renders a view template, you need this setup:

view_paths = Rails::Application::Configuration.new(Rails.root).paths["app/views"]
av_helper = ActionView::Base.new(view_paths).extend YourHelperModule

av_helper.your_helper_method