For certain urls, english text will be used in the url and you may wish to change it. For example, consider the following url:
http://www.example.com/category/1/1/watches
'watches' would be from your custom slug, but 'category' is default. To change this edit the rewrite class file>
control/classes/class.rewrite.php
In the case of 'category', change the following in the first array:
'cat' => 'category',
Enter your own value.
DO NOT change the key, in this case 'cat'. So your new text might look like this:
'cat' => 'my-new-cat',
DO NOT use spaces in names as this is bad for urls. Also, forward slashes are not allowed. So, now your url would look like this:
http://www.example.com/my-new-cat/1/1/watches
If you have enabled the cache, make sure you clear it to see the changes.