Update README.md

README.md

@@ -34,13 +34,13 @@ You need to specify the `repeater` url, `generates_from` and `codename` paramete
 ```
   - `repeater` -> A URL of a service you host on your server and that forwards JSON from Preview API based on "/items?elements.<url_slug_codename>[contains]=<url_slug_value>&depth=0" query
   - `generates_from` -> A codename of a source Text element you want your url slug to be generated from
-  - `codename` -> A codename of your Custom URL Slug element
+  - `codename` -> A codename of your Custom URL Slug element (same codename across all types you want to check the uniqueness for)
   - `force_uniqueness` -> A true/false value that generates extra postfix to the url slug value in case the url slug is not unique
   - `restricted_chars` -> A set of characters (RegEx) you want the url slug to be restricted to
 
 ## Saved Value
 
-The value is saved as an array of [<url_slug_value>, <autogenerated/manual>] so you know whether the value was generated automatically from the source element or whther it was entered manually:
+The value is saved as an array of [<url_slug_value>, <autogenerated/manual>] so you know whether the value was generated automatically from the source element or whether it was entered manually:
 
 ```json
 ["abc","[manual]"]