OET interlinear ISA 14:20

uW Translation Notes:

Note 1 topic: figures-of-speech / metaphor

לֹֽא־יִקָּרֵ֥א לְ⁠עוֹלָ֖ם זֶ֥רַע מְרֵעִֽים

not not he/it_will_be_called forever,perpetuity seed/offspring evildoers

The taunters are speaking as if the descendants of wicked rulers were seed. Your language may have a comparable expression that you can use in your translation, or you could state the meaning plainly. Alternate translation: [The descendants of evildoers will not be remembered forever]

Note 2 topic: figures-of-speech / activepassive

לֹֽא־יִקָּרֵ֥א לְ⁠עוֹלָ֖ם זֶ֥רַע מְרֵעִֽים

not not he/it_will_be_called forever,perpetuity seed/offspring evildoers

The expression will not be named is a passive verbal form. If it would be unnatural to use that form, you could express the idea in active form or in another way that is natural in your language. If you need to say who does the action, the context indicates that it is people in general. Alternate translation: [People will never mention the offspring of evildoers]

Note 3 topic: grammar-connect-logic-result

כִּֽי

that/for/because/then/when

The word translated as for indicates that what follows is a reason for the preceding statement. The king of Babylon will not be buried with honor because he destroyed his own land and killed his own people. Alternate translation: [because]