trying to embed erb inside yml locale file

_form.html.haml

          .form-actions
            - if params[:action] == "new"
              = button_tag type: "submit", class: "btn btn-success btn-cons",
                          id: "submit" do
                = fa_icon "check"
                %span  Create

              = link_to courses_path, class: "btn btn-danger btn-cons" do
                = fa_icon "close"
                %span  Cancel
            - elsif params[:action] == "edit"
              = button_tag type: "submit", class: "btn btn-warning btn-cons",
                          id: "submit" do
                = fa_icon "pencil"
                %span  Edit

              = link_to @course, class: "btn btn-danger btn-cons" do
                = fa_icon "close"
                %span  Cancel

en.yml

en:
  helpers:
    submit:
      create: hello <%= fa_icon "pencil" %>
      update: hello <%= fa_icon "user" %>