Hello,

if I choose a specific user from K2 Users module to show all K2 items of that user, the date is not shown correctly ("SP_1SP_0SP_").

Please help! Thanks!

Are you using overrides for that modules.
Can you check with the default module?

I can find /html/templates/shaper_bloggani/html/com_k2 ... do you mean this? How can I add the language files?

I never said anything in this thread about language files.
Can you try renaming user.php in that folder and checking again?