Literally, "welcome is before you"?
Is there a (somewhat) comprehensive list on what nouns are on/before/with someone? Or do we pick them up one by one?
I posted a list a while ago about what nouns go with what prepositions. It's by no means comprehensive, but a good start
I'm glad to hear it. Is this list in the forums?
Yes, but it's pretty far back. I wish Duolingo offered an easy way to search.
Would this be used an an answer for when someone thanks you, or more in the sense of "You are welcome to my house"?
Since this is the plural “you”, it would be used either as a response to when multiple people thank you or to welcome multiple people to your house.
I thought that tá fáilte robhat was you are welcome to a place, while go ndéana a maith duit or níl a bhuíochas ort were better for a response to thank you.
I don't know about the other phrases, but ive always been led to believe Tá fáilte romhat worked in both situations
"You are all welcome"?
Could someone clue me the difference in the sounding of roimh and romhaibh
You can hear "roimh" pronounced in these exercises:
"Tá arán roimh an gcaife" https://www.duolingo.com/comment/14506180
"Ithim roimh an bportán" https://www.duolingo.com/comment/4590440