Translate UserDefinedForm Module fields with fluent

<%- if @topic_view.topic.tags.present? %>
<%= t 'js.tagging.tags' %>: <%- @topic_view.topic.tags.each do |t| %> <%= t %> <%- end %>
<% end %>

Silverstripe Version: 4.4

Question: Can anybody explain, how to make UserDefinedForm fields translatable with fluent?

THX for your help.