privacytools.io/_plugins/translate-filter.rb

module Jekyll
  module TranslateFilter
    def translate_text(input)
      if input.nil? or input.empty?
        input
      else
        text          = input.strip
        weblate_id    = Weblate::ID.get(input)
        page_language = @context.environments.first["page"]["language"]
        site          = @context.registers[:site]
        
        if page_language.nil?
          Weblate::SourceFile.add_entry(weblate_id, text)

          Liquid::Template.parse(text).render(@context)
        else
          translated_string = site.data["languages"][page_language][weblate_id]

          translated_string.nil? ? Liquid::Template.parse(text).render(@context) 
                                 : Liquid::Template.parse(translated_string.strip).render(@context)
        end
      end
    end

    def translate_page(page)
      page_language = @context.environments.first["page"]["language"]
      if page_language.nil?
        page
      else
        "/#{page_language}#{page}"
      end
    end

    def append_lang(page)
      page_language = @context.environments.first["page"]["language"]
      if page_language.nil?
        page
      else
        "#{page}/#{page_language}"
      end
    end

    def tl_note(text, comment)
      text
    end
  end
end

Liquid::Template.register_filter(Jekyll::TranslateFilter)