In Irish it's "Fáilte ar ais"
"Gaelic" can mean "Irish Gaelic' or "Scottish Gaelic". They are classified as two distinct languages.
Fàilte gu Pàislig
Fàilte gu Wikipedia
In Irish Gaelic, you can say "Fáilte roimh chlann agus cairde." In Scottish Gaelic, it is "Fàilte do dh'fhoghlam is do charaidean." Both phrases convey a warm welcome to family and friends in their respective languages.
Fàilte is the Scottish Gaelic for 'welcome'.
Tá fáilte roimh an Tiarna. (Irish)
In Flemish, you say "welkom terug" to say welcome back.
You could say "welcome back" or "glad to see you home."
You could say "Welcome back".
You can say "Dobrodošli nazad" in Bosnian to greet someone with "welcome back."
welcome back
welcome terug