text: import os
  
  import click
  
  
  def register(app):
      @app.cli.group()
      def translate():
          """Translation and localization commands."""
  
      @translate.command()
      @click.argument("lang")
      def init(lang):
          """Initialize a new language."""
          if os.system("pybabel extract -F babel.cfg -k _l -o messages.pot ."):
              raise RuntimeError("extract command failed")
          if os.system(
              "pybabel init -i messages.pot -d app/translations -l " + lang
          ):
              raise RuntimeError("init command failed")
          os.remove("messages.pot")
  
      @translate.command()
      def update():
          """Update all languages."""
          if os.system("pybabel extract -F babel.cfg -k _l -o messages.pot ."):
              raise RuntimeError("extract command failed")
          if os.system("pybabel update -i messages.pot -d app/translations"):
              raise RuntimeError("update command failed")
          os.remove("messages.pot")
  
      @translate.command()
      def compile():
          """Compile all languages."""
          if os.system("pybabel compile -d app/translations"):
              raise RuntimeError("compile command failed")
  