Slán go fóill a thaisce
It's Gaelic -- probably what was meant was "Mar sin leibh an-drasta" which means "Goodbye, for now". "Mar sin leibh" = "Goodbye" + "an-drasta" = "for now". This is in Scottish Gaelic (Gàidhlig), not Irish Gaelic (Gaeilge)
saol álainn faoi shíocháin anois
Mar sin leat an-dràsta! goodbye for now! Slàn leat an-dràsta goodbye for now Slàn leat! (response) Slàn agad!
Perhaps 'Cheerio an-dràsda" means "Goodbye just now".
The Irish Gaelic spelling for 'Maeve' is Meadhbh, now modernized as Méabh.
In Irish Gaelic it means 'Love now and forever'.
Téigh amach anois, le do thoil would be the Irish.
Irish Gaelic, Scots Gaelic, and Welsh are all Celtic-Gaelic languages that are still widely spoken today. There are also Cornish and Manx which are now mostly dead.
latha math (an-drà sda) = Goodbye (for now)Mar sin leibh is the polite form, the familiar form would be Mar sin leat.
"Slán" - said "slawn". Means "goodbye". "Slán go fóíll" - said "slawn go fó-il". Means "goodbye for now".
There is no Irish equivalent for the French name.
The original language of Ireland is "Gaelic" but it almost became a dead language until it was brought back to Irish schools. They speak English as their primary language now and Gaelic as a secondary one. The language is called the "Irish language" in Ireland in preference to "Gaelic" which can, and often does, refer to Scottish Gaelic.