Solution : https://service.sap.com/sap/support/notes/164395 (SAP Service marketplace login required)
Key words : 
importing special textswhen importing special texts, system issues error message tl 137, job sap language-import-job-3, includes frequently asked questions, profile parameter zcsa/installed_languages, smlt -> schedule import -> menu, -> partial imports-> single tables, handling language-dependent texts, code page/locale, complete setenter serpt
Related Notes : 
       
| 325186 | Language import:long runtime in SMLT and LANG_IMP3 | 
| 207670 | Language not completely installed | 
| 175676 | Additions upgrading to 4.6A FCS | 
| 155674 | Additions upgrade to Release 4.6A | 
| 154351 | Known problems during lang. import of patch texts | 
| 18601 | Frequently asked questions on language transport |