The word "six" is English and means the number 6. Similarly, "kings" is English, referring to male monarchs or rulers in a plural form. "Dove," in this context, is also English, meaning a type of bird known for symbolizing peace. The Italian word "vederlo" translates to "to see him" or "to see it" in English; it is derived from the verb "vedere" (to see) combined with the pronoun "lo" (him/it), indicating the object of the action.

Thus, the term "vederlo" is a foreign-language word among the provided list, while "six," "kings," and "dove" are English words. In summary:

• six: English, number 6
• kings: English, plural of king
• dove: English bird species
• [vederlo](javascript:void(0)): Italian for "to see him" or "to see it" indicating an action directly involving seeing someone or something

This differentiation follows your guideline to mark foreign words with the [...](javascript:void(0)) tag to help instantly spot them.