Solution : https://service.sap.com/sap/support/notes/849814 (SAP Service marketplace login required)
Key words :
run-time object translations, button text reason, attached notes carefully 1, sotr_default_context_flag_set report reset, rslang20 report, field labels, logon language, terms translation, installation problem, long texts
Related Notes :
448220 | OTR: Text is not determined/incorrect text is displayed |
110910 | Deleting the language load |