Solution : https://service.sap.com/sap/support/notes/302451 (SAP Service marketplace login required)
Summary : 
      This SAP Note provides guidelines for installing additional languages into an IS-Oil system version 4.6B, which originally supports only German and English. Users requiring additional language support must use the designated IS-OIL 46B language CDs detailed within the note. The CDs not only contain standard translations but also specific adaptations for the IS-OIL add-on. Instructions include steps for a correct installation of these languages during system upgrades or initial setups, emphasizing the imperative use of these CDs instead of standard language CDs to avoid potential issues.
Key words : 
car       tp addtobuffer sofk001190 <sid>       tp import sofk001190 client000 <sid> hungarian language import, car       tp addtobuffer sofk001190 <sid>       tp import sofk001190 client000 <sid>   nt, sapservx      ~ftp/specific/isoil/46b/notes/note, cd /usr/sap/trans       car -xvf k001190, cd \usr\sap\trans       car -xvf k001190, ~ftp/specific/isoil/46b/notes/note, de/en/zh/ko/ja/zf, -> special imports -> development classes ->   export set, -oil system additional key words, -oil 46b language cd
Related Notes : 
       
| 332889 | IS-Oil: Upgrade from 6.1.0 (4.0B) to 4.6B | 
| 332654 | IS-OIL / IS-MINE / IS-CWM: Overview of SAP Notes | 
| 300613 | IS-Oil: Upgrade 4.6B and DEL-CA-JVA | 
| 300609 | IS-Oil: Upgrade 4.6B with CA-JVA 4.61 | 
| 207629 | Additional Info: IS-Oil / IS-Mine Installation 4.6B | 
| 13719 | Preliminary transports to customers (note for customers) |