For

Krusader

faoi choinne
i gcomhair
le haghaidh

also
ar son

What is each on specifically used for?
Are these dialectal variants of the same thing

pog it

There are subtle differences. If you have the Ó Dónaill dictionary you should be able to find examples of them in context.
Is there anything specifically you're wondering about?

Krusader

I'm looking for those subtle differences, I usually translate them as "for the purpose of" and
ar son as "on behalf of"

pog it

Well with 'ar son' , which I think is used in all the dialects, definitely Conamara anyway, it means 'for' in the sense of 'for the sake of': as in 'ar son na cúise' (for the cause)

le haghaidh and faoi choinne are used in same contexts as each other. But I myself have yet to hear faoi choinne used in Conamara Irish (but that's just in my experience- Nuggles would be able to tell you for sure if they're around these parts). But definitely le haghaidh is used all the time in Conamara.
e.g. le haghaidh dinnéir (meeting up for dinner for example).

faoi choinne is used in Donegal, definitely, but you will hear faoi as 'fá' in this context. Just like faoi is 'fé' in Munster Irish.

For 'on behalf of' I would use 'thar ceann' rather than 'ar son'. For e.g. 'urlabhraí atá ann thar ceann an Fhorais' (on behalf of the Foras)

pog it

Then for 'i gcomhair' I think of in the context of say 'refreshments for the night': 'soláistí i gcomhair na hoíche', say if you were camping or whatever.

But le haghaidh would be used probably as well for that, as it has similar meaning.

Just develop your own vocabulary bank from what you like the best.

dlofnep

For is the most confusing word in Gaeilge. I made a post about it on here a year or two ago. Someone posted a link that was really helpful. Let me see if I can find it.

dlofnep

Here it is: http://gaeilge.wikia.com/wiki/How_to_translate_the_English_preposition_%22for%22_into_Irish

Pog It posted it for me the first time. So credit to him

pog it

Her. I'm female sorry just wanted to clarify that!!