I'm doing some translation of Greek into Irish and I'd like to use the first person imperative which is quite common in Greek: 'Στο κάτω κάτω ας πεθάνω για μια αγάπη μια κι έξω' (a song by Sfakianakis)
Let me die for love...

Could I translate this as: I ndeireadh na dála, faighim bás/éagaim do ghrá ...

How would you know it's an imperative and not just a straight indicative ?

Imperative first person is used, e.g.

as a command to someone else,
Ná cloisim focal asat! = Don't let me hear a word from you!
Cloisim arís uait é sin! = Let me hear that from you again!

as an anticipation of a command by someone else,
Fanaim i mo thost, an ea? = I should stay silent, right?

as a suggestion,
cuirim i gcás (go) = let me put in case (often used as "for instance" or "let's say (that)")

as a mean of indifference,
déanaim nó ná déanaim ní bheidh sí sásta. = let me do it or don't let me do it / if I do it or not, it doesn't matter, she won't be satisfied

for a condition:
Déanfainn é agus bím anseo = I'd do it if I'd be here (perhaps "... let only be me here")

But all that doesn't really answer your question.
I don't know.

Heard another example from my university teacher: "smaoitim!" (= let me think!)

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne

I love the examples from Labhrás and Lughaidh. Thanks for asking a question that inspired them to provide them that I might benefit.

what if you used go bhfaighe mé instead?

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ЯГОН ТОҶИК НЕСТ ИНҶО???

Go bhfaighe mé isn't an order you give to yourself, but rather a request or a wish: may I get!

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne

But what to use for στο κάτω-κάτω ας πεθάνω για μια αγάπη?

https://www.youtube.com/watch?v=cb4wFTYF-pc

From the context (acc. to Google Translator), I find faighim bás among all the other imperatives in the lyrics (μη με ρωτάτε = ná fiafraigh díom) okay.


BTW: Google Translator suggests "lig dom bás" I would add "... a fháil" or rather: lig dom fáil bháis

brah...
The English given was "Let me die of love" which is not an order at all, but rather a request/wish. When we say "Let it snow" we are not giving any kind of orders, we are making wishes! I figure if the English is an accurate translation of the Greek, perhaps we can use go bhfaighe mé here. Of course, if the Greek is different from the English translation then who knows! Certainly not I, who know no modern Greek whatsoever!

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ЯГОН ТОҶИК НЕСТ ИНҶО???

Thank you for these excellent examples! I think in the context go bhfaighe mé is what it wants, but the example from Lughaide's teacher sounds like it would also work too. So I wind up with

I ndeireadh na dála, go bhfaighe mé do ghrá, faoi deireadh is faoi dheoidh... (a little awkward repetition but it's just an exercise after all...)

I ndeireadh na dála, go bhfaighe mé bás do ghrá, faoi deireadh is faoi dheoidh

I am wondering -- does it make sense to bás a fháil do rud? Something is telling me ag would work better.

Also both of these guys are better sources than I am so it makes me nervous that you liked my suggestion :0

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ЯГОН ТОҶИК НЕСТ ИНҶО???