Solution : https://service.sap.com/sap/support/notes/775523 (SAP Service marketplace login required)
Key words : 
'select data elements' selects data elements, bidi control codes filter flag, enter program i18n_set_dataelement_flags andpress 'execute', terms ltr display flag, set bidi ddic flags, setting bidi ddic flags, bidi ddic flags, transfer data elements, data elements reason, web application server 6
Related Notes : 
       
| 1245869 | |
| 779879 | BIDI: Support for fieldwise base direction | 
| 777333 | Special output fields in RTL languages |