Approval.

backend/zh/link.json

@@ -94,6 +94,8 @@
         "registered_urls": "Registered URLs",
         "clicks": "Clicks",
         "registered_at": "Registered at",
-        "url_alias": "URL Alias"
+        "url_alias": "URL Alias",
+        "explica_alias": "The main alias of the link. This tool provides pretty URLs that refer the user onwards to a given target URL. The \"prettier\" URL may e.g. be \"https:\/\/ex.musdig.org\/test\". In this example, the identifier would be \"test\" - say, anything after the main URL. Please note that each identifier must be unique. If any other user has registered the same identifier you want to use before, you will have to choose another one.",
+        "explica_target_url": "This service refers the user onwards to a given website. Here you should enter the target URL of the referral."
     }
 }