Gaelic is a group of languages, not a single one.? Irish, Scots (Scottish Gaelic) are the spoken languages?in that group today.? Welsh is related, but it's a different type of Gaelic.
Be careful when pronouncing Irish phrases - the language may be written with the Roman alphabet, but it's not pronounced like that.? Siobhan?? "shi - vawn".? Fáilte?? "fall-cha".
In Irish, a welcome is treated like a physical object (Irish is WEIRD), so you generally give someone a welcome or have a welcome.? It's commonly shortened to: