Solution : https://service.sap.com/sap/support/notes/352941 (SAP Service marketplace login required)
Summary : 
      This SAP Note delineates the intricacies involved in handling languages during the import of Support Packages. The document discusses the potential conflicts and prescribed procedures across various SAP releases, highlighting the significant differences starting from 3.1I to releases beyond 4.5A. For instance, older versions require storing translations from Support Packages before language CD imports, whereas newer versions post-4.5A utilize a selective language import approach to streamline processes and minimize database load. Moreover, the note addresses considerations for subsequent imports post-language CD installation, ensuring a consistent language version throughout the system aligned with the latest Support Package levels. It also touches on the specific methods to handle similar issues for add-ons from Basis Release 4.6C onwards.
Key words : 
menu pathlanguage -> special actions -> import support packages, create support package transport requests, tp postlanguageimport command anymore, support package level included, support package collection cds, support package transport request, subsequent imports rstlan_import_ocs works, 'special requirements' section, tp postlanguageimport command, support package level
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