I'm curious about your 'orthab'. This is the first I've seen the word, and I get the impression from your usage that it's equivalent to 'orthu', but I can't find anything online explaining meaning or usage. Does it have the same meaning as 'orthu'? When might it be used?
I'm not saying they should be accepted. I'm looking at the linguistic structure of how Irish Gaelic constructs the statement. I'm looking at how the Gaelic WORKS. I'm not trying to just learn how to translate a sentence in Irish Gaelic into the equivalent English sentence, I'm trying to understand how to think in Gaelic.