Solution : https://service.sap.com/sap/support/notes/1040014 (SAP Service marketplace login required)
Key words :
choose data -> import external data -> import data2, symptom directly loading unicode csv data, microsoft excel displays garbled characters, original data type, exported csv file, import csv, comma seperated values, simply double-clicking, garbled characters, unicode characters
Related Notes :
| 1319517 | Unicode Collection Note |
| 1040015 | Fix Unicode issue with CSV content type |