Finally I've managed to do the solution!!!
And I'm very happy of this!
To obtain correct Date And Time display (plus two hide functions) in Austerity Shell is needed to add following lines to "1-LiteStep.script"
IniRead,%VistaInfo%,"VistaInfo","Locale",%Nationality%
If,"%Nationality%",Equal,"Italian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","h:nn","i:nn"
If,"%Nationality%",Equal,"Italian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseEnter","TimeLblOnMouseEnter"
If,"%Nationality%",Equal,"Italian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseLeave","TimeLblOnMouseLeave"
If,"%Nationality%",Equal,"Italian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","ddd. mmm. d","ddd. d mmm."
If,"%Nationality%",Equal,"French",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","h:nn","i:nn"
If,"%Nationality%",Equal,"French",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseEnter","TimeLblOnMouseEnter"
If,"%Nationality%",Equal,"French",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseLeave","TimeLblOnMouseLeave"
If,"%Nationality%",Equal,"French",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","ddd. mmm. d","ddd. d mmm."
If,"%Nationality%",Equal,"Russian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","h:nn","i:nn"
If,"%Nationality%",Equal,"Russian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseEnter","TimeLblOnMouseEnter"
If,"%Nationality%",Equal,"Russian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseLeave","TimeLblOnMouseLeave"
If,"%Nationality%",Equal,"Russian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","ddd. mmm. d","ddd. d mmm."
If,"%Nationality%",Equal,"German",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","h:nn","i:nn"
If,"%Nationality%",Equal,"German",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseEnter","TimeLblOnMouseEnter"
If,"%Nationality%",Equal,"German",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseLeave","TimeLblOnMouseLeave"
If,"%Nationality%",Equal,"German",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","ddd. mmm. d","ddd. d mmm."
If,"%Nationality%",Equal,"Turkish",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","h:nn","i:nn"
If,"%Nationality%",Equal,"Turkish",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseEnter","TimeLblOnMouseEnter"
If,"%Nationality%",Equal,"Turkish",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseLeave","TimeLblOnMouseLeave"
If,"%Nationality%",Equal,"Turkish",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","ddd. mmm. d","ddd. d mmm."
If,"%Nationality%",Equal,"Greek",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","h:nn","i:nn"
If,"%Nationality%",Equal,"Greek",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseEnter","TimeLblOnMouseEnter"
If,"%Nationality%",Equal,"Greek",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseLeave","TimeLblOnMouseLeave"
If,"%Nationality%",Equal,"Greek",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","ddd. mmm. d","ddd. d mmm."
Then all works very fine!
My happiness is originated from two facts:
1. I'm a newbie of WB (or I was? ) and sure I was widely helped, but the issue, the research and the solution are finally of mine ;
2. I'm publishing this update before NightMan ( ) updated (as announced) the default LiteStep script...
I really enjoyed myself: thank you so very much (ALL)!!!
Btw: if some "small" corrections should be needed my happiness should not change...
You can probably take this further just to make it easier to read and modify later by placing each Locale setting in its own section as such:
[Italian]
IniRead,%VistaInfo%,"VistaInfo","Locale",%Nationality%
If,"%Nationality%",Equal,"Italian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","h:nn","i:nn"
If,"%Nationality%",Equal,"Italian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseEnter","TimeLblOnMouseEnter"
If,"%Nationality%",Equal,"Italian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseLeave","TimeLblOnMouseLeave"
If,"%Nationality%",Equal,"Italian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","ddd. mmm. d","ddd. d mmm."
[French]
If,"%Nationality%",Equal,"French",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","h:nn","i:nn"
If,"%Nationality%",Equal,"French",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseEnter","TimeLblOnMouseEnter"
If,"%Nationality%",Equal,"French",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseLeave","TimeLblOnMouseLeave"
If,"%Nationality%",Equal,"French",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","ddd. mmm. d","ddd. d mmm."
[Russian]
If,"%Nationality%",Equal,"Russian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","h:nn","i:nn"
If,"%Nationality%",Equal,"Russian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseEnter","TimeLblOnMouseEnter"
If,"%Nationality%",Equal,"Russian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseLeave","TimeLblOnMouseLeave"
If,"%Nationality%",Equal,"Russian",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","ddd. mmm. d","ddd. d mmm."
[German]
If,"%Nationality%",Equal,"German",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","h:nn","i:nn"
If,"%Nationality%",Equal,"German",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseEnter","TimeLblOnMouseEnter"
If,"%Nationality%",Equal,"German",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseLeave","TimeLblOnMouseLeave"
If,"%Nationality%",Equal,"German",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","ddd. mmm. d","ddd. d mmm."
[Turkish]
If,"%Nationality%",Equal,"Turkish",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","h:nn","i:nn"
If,"%Nationality%",Equal,"Turkish",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseEnter","TimeLblOnMouseEnter"
If,"%Nationality%",Equal,"Turkish",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseLeave","TimeLblOnMouseLeave"
If,"%Nationality%",Equal,"Turkish",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","ddd. mmm. d","ddd. d mmm."
[Greek]
If,"%Nationality%",Equal,"Greek",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","h:nn","i:nn"
If,"%Nationality%",Equal,"Greek",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseEnter","TimeLblOnMouseEnter"
If,"%Nationality%",Equal,"Greek",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc",";TimeLblOnMouseLeave","TimeLblOnMouseLeave"
If,"%Nationality%",Equal,"Greek",TXTReplace,"%TargetDir%\Program#$sFiles\LiteStep\themes\austerity\config\system_time.rc","ddd. mmm. d","ddd. d mmm."
This way all you would need to do is this:
If,"%Nationality%",NotEqual,"Auto",[%Nationality%]
You didn't make one for Uk English so not sure what will happen if that is selected. Might just process the default. I haven't tested this so not sure if the above If statement would work but it would make the code appear cleaner and easier to read