OET interlinear PSA 118:2

uW Translation Notes:

Note 1 topic: figures-of-speech / metonymy

יֹֽאמַר־נָ֥א יִשְׂרָאֵ֑ל

say now (Some words not found in UHB: say now Yisrael that/for/because/then/when [is],forever loyalty_of,his_covenant )

Here, Israel represents the people of Israel. If it would be helpful in your language, you could use an equivalent expression or plain language. Alternate translation: [Let the people of Israel indeed say]

Note 2 topic: figures-of-speech / imperative3p

יֹֽאמַר־נָ֥א יִשְׂרָאֵ֑ל

say now (Some words not found in UHB: say now Yisrael that/for/because/then/when [is],forever loyalty_of,his_covenant )

The psalmist is saying what he wants Israel to do. See the discussion in the introduction to Psalms about “let” and “may” and follow the decision of your team of how a speaker will express in this context what he wants someone to do. Alternate translation: [May Israel indeed say]

Note 3 topic: figures-of-speech / idiom

כִּ֖י לְ⁠עוֹלָ֣ם חַסְדּֽ⁠וֹ

(Some words not found in UHB: say now Yisrael that/for/because/then/when [is],forever loyalty_of,his_covenant )

See how you translated this in the previous verse.

Note 4 topic: figures-of-speech / ellipsis

כִּ֖י לְ⁠עוֹלָ֣ם חַסְדּֽ⁠וֹ

(Some words not found in UHB: say now Yisrael that/for/because/then/when [is],forever loyalty_of,his_covenant )

The psalmist is leaving out some of the words that in many languages a sentence would need in order to be complete. You can supply these words from the context if that would be clearer in your language. Alternate translation: [We praise Yahweh for his covenant faithfulness is to forever]