To implement multilingual sites in Drupal, enable the core Language module and the Internationalization (i18n) module suite. Configure language settings to enable multiple languages and translation options. Translate content, menus, and interface elements, and use the Language Switcher block or menu to allow users to switch between languages.

To create a portfolio in Drupal, utilize content types to represent portfolio items, including fields such as images, descriptions, and categories. Then, use Views to display portfolio items in a grid or list format with filters and sorting options. Customize the display using CSS or Drupal themes to achieve the desired layout and styling for the portfolio.

To receive an email notification when someone submits a webform in Drupal, configure the Webform module's email settings. Navigate to the webform's "Emails" tab and add an email handler. Enter your email address in the "To" field and configure other settings as needed, such as the subject and message format. Save the settings, and you'll receive an email notification whenever someone submits the webform.

To set up SEO-friendly clean URLs in Drupal 7, enable the Clean URLs feature by navigating to Administer > Configuration > Search and metadata > Clean URLs. Ensure that your server's mod_rewrite module is enabled and properly configured. Once enabled, Drupal will automatically generate clean URLs for your site, improving search engine visibility and user experience.

To update existing URL paths using Pathauto in Drupal, navigate to Administer > Configuration > Search and metadata > URL aliases > Bulk update. Select the appropriate content types and taxonomy vocabularies, then click "Update" to generate new URL aliases based on the configured patterns. Finally, clear Drupal's cache to apply the changes across your site.

To use Meta Tags with Drupal content, install and enable the Meta Tags module. Configure the module settings to define default meta tag values or allow users to customize them per content item. Then, navigate to the content item's edit page, where you can specify meta tags such as title, description, and keywords in the Meta Tags section.

To speed up a slow Drupal site, optimize database performance by regularly cleaning up unused data and enabling caching mechanisms such as Drupal's built-in caching or using a caching module like Boost or Varnish. Minimize and optimize CSS, JavaScript, and image files to reduce page load times. Additionally, consider using a content delivery network (CDN) to serve static assets more efficiently and leverage server-side performance optimizations such as PHP opcode caching and server-level caching.