OET interlinear ZEC 8:12

uW Translation Notes:

Note 1 topic: figures-of-speech / metaphor

זֶ֣רַע הַ⁠שָּׁל֗וֹם

seed/offspring of_(the),peace

Yahweh is speaking of future prosperity as if it were a seed planted in peace that would produce an abundant harvest. Your language may have a comparable expression that you can use in your translation, or you could state the meaning plainly. Alternate translation: [there will be peace and prosperity]

Note 2 topic: grammar-connect-words-phrases

כִּֽי

that/for/because/then/when

Here the word For introduces not a reason but an explanation. You may want to use a different connecting word to show how this statement relates to what comes before it. Alternate translation: [Instead]

Note 3 topic: figures-of-speech / abstractnouns

הַ⁠שָּׁל֗וֹם

of_(the),peace

See how you translated the similar expression in 8:10.

Note 4 topic: figures-of-speech / personification

הַ⁠גֶּ֜פֶן תִּתֵּ֤ן פִּרְיָ⁠הּ֙ וְ⁠הָ⁠אָ֨רֶץ֙ תִּתֵּ֣ן אֶת יְבוּלָ֔⁠הּ וְ⁠הַ⁠שָּׁמַ֖יִם יִתְּנ֣וּ טַלָּ֑⁠ם

the,vine yield fruit_of,its and=the=earth give DOM produce_of,its and,the,heavens give dew_of,their

Yahweh speaks of the vine, the land, and the heavens as if they were persons who could give things to people. If it would be helpful in your language, you could state the meaning plainly. Alternate translation: [fruit will come from the vine, produce will come from the land, and dew will fall from the heavens]