Here is a list of the new language texts IDs for v5.8.1 (Since 5.6 )
Application - Explorer Panel - ( ExplorerPanel_lang_en.xml )
Global
G-2000
G-2001
G-2002
G-2003
Commands
C-135
C-138
C-470
Settings
S-606
S-610
S-671
S-672
S-675
S-676
Dialog
D-800-806
D-810-814
D-820-823
D-830-837
D-840-843
Application - Application - Multi Commander - ( MultiCommander_lang_en.xml )
Dialog
D - 2341
D-2342
D-2343
D-2644
D-2700
D-2701
D-2702
Application - FSFTP - ( FSFTP_lang_en.xml )
Dialog
D-128