Add documentation for custom directory names in automated translations

settings/internationalization.mdx

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+# Internationalization Settings
+
+## Directory Configuration
+
+### Custom Translation Directories
+
+You can now customize the directory names for your translated content. This gives you more flexibility in organizing your multilingual documentation structure instead of being limited to default directory names.
+
+To specify custom directory names for translations:
+
+```yaml
+i18n:
+  directories:
+    fr: "french-docs"
+    es: "spanish-content"
+    de: "german-documentation"
+```
+
+In this example:
+- French translations will be stored in the `french-docs` directory
+- Spanish translations will be stored in the `spanish-content` directory
+- German translations will be stored in the `german-documentation` directory
+
+If no custom directory names are specified, the system will use the default behavior of using language codes as directory names (e.g., `fr`, `es`, `de`).
+
+### Benefits of Custom Directory Names
+
+- **Better Organization**: Create a directory structure that matches your project's naming conventions
+- **Improved Clarity**: Use descriptive names that clearly indicate the content of each translation directory
+- **Flexibility**: Adapt the directory structure to your team's specific needs and workflows
+
+### Important Notes
+
+- Directory names must be unique across all languages
+- Names should only contain alphanumeric characters, hyphens, and underscores
+- The specified directories will be created automatically when translations are generated
+- Changing directory names after content has been translated will require manually moving the files to maintain consistency