The words you asked about come from different languages:
- [culpa](javascript:void(0)) is Spanish and means "fault" or "blame."
- [nuestra](javascript:void(0)) is also Spanish and means "our."
- [kiedy](javascript:void(0)) is Polish and means "when."
So, "culpa" and "nuestra" are Spanish words commonly used to express ownership of fault or blame, as in the phrase "culpa nuestra," which translates to "our fault." The Polish word "kiedy" is used to ask about time, equivalent to "when" in English.