docs: Clarify difference between slug and url

Author: digitalcraftsman

docs/content/content/front-matter.md

@@ -101,13 +101,12 @@ Field names are always normalized to lowercase (e.g. `camelCase: true` is availa
 * **draft** If true, the content will not be rendered unless `hugo` is called with `--buildDrafts`
 * **publishdate** If in the future, content will not be rendered unless `hugo` is called with `--buildFuture`
 * **type** The type of the content (will be derived from the directory automatically if unset)
-* **isCJKLanguage** If true, explicitly treat the content as CJKLanguage (.Summary and .WordCount can work properly in CJKLanguage)
+* **isCJKLanguage** If true, explicitly treat the content as CJKLanguage (`.Summary` and `.WordCount` can work properly in CJKLanguage)
 * **weight** Used for sorting
 * **markup** *(Experimental)* Specify `"rst"` for reStructuredText (requires
             `rst2html`) or `"md"` (default) for Markdown
-* **slug** The token to appear in the tail of the URL,
-   *or*<br>
-* **url** The full path to the content from the web root.<br>
+* **slug** appears as tail of the url. It can be used to change the part of the url that is based on the filename.
+* **url** The full path to the content from the web root. It makes no assumptions about the path of the content file. It also ignores any language prefixes of the multilingual feature.
 
 *If neither `slug` or `url` is present, the filename will be used.*