content: import os
  from flask import Blueprint
  import click
  
  bp = Blueprint('cli', __name__, cli_group=None)
  
  
  @bp.cli.group()
  def translate():
      """Translation and localization commands."""
      pass
  
  
  @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')
  