Learn Farsi: پروردگارا، کاش با این تاریکی ابدی مبارزه می‌کردیم. - O Lord, I wish we were fighting this eternal darkness.

The -â is a literary suffix used to address someone directly (the vocative case), acting like 'O...' in English. Here, it attaches to parvardegâr (Lord/Creator) to mean 'O Lord'. You will encounter this mostly in poetry, prayers, or highly formal speech.

Could I use the word ey before the noun instead of adding -â to the end?

Yes! You could say ey parvardegâr and it would mean exactly the same thing. In classical literature and formal prayers, you might even see both used together for extra emphasis, such as ey parvardegârâ.

Why does the Farsi sentence use bâ (with) instead of making 'this eternal darkness' a direct object?

In Farsi, the compound verb mobâreze kardan (to fight/struggle) requires the preposition bâ (with) to indicate what or whom you are fighting against. You cannot use the direct object marker râ here. You are essentially saying 'to do a struggle with this eternal darkness'.

Why is the verb mobâreze mi-kardim in the past continuous tense if the wish is about the present?

When using kâsh (I wish / if only) to express an unreal or hypothetical wish about a present, ongoing situation, Farsi uses the past continuous tense. Because the speakers are not currently fighting the darkness but wish they were doing so right now, the past continuous mi-kardim is required.