Solution : https://service.sap.com/sap/support/notes/1101128 (SAP Service marketplace login required)
Key words : 
symptom wrong zh text, input proper translation, terms translation, prerequisites translation, correct solution, translation manually, logon system, select enus, source language, target language
Related Notes : 
       
| 1584204 | |
| 585116 | Translation after installation of WebAS SP25 |