There's actually no such language as "Celtic". Celtic refers to a group of dozens of languages, six of which are spoken today:
In Irish Gaelic, you can say "comhghairdeas," which means congratulations. In Scottish Gaelic, you can say "mìle comhghairdeas," which also means congratulations.
In Māori, you can say "whakamihi" which means congratulations.
"Proficiat" is how you say congratulations in Flemish.
In Filipino, you would say "Congratulations" as "Congratulations" or "Pakaka-bait."
To say "congratulations" in French, you can say "félicitations."
In Latin, you can say "Gratulor," which means congratulations.
congratulations on.
No, you cannot say, they send their congratulations. You have to say they sent their congratulations.
In Māori, you can say "whakamihi" which means congratulations.
no flowers say congratulations
In Filipino, you would say "Congratulations" as "Congratulations" or "Pakaka-bait."
You can say "čestitke" in Bosnian to say congratulations.
In Hindi, you can say congratulations by saying "बधाई हो" (Badhai ho).
To say "congratulations" in French, you can say "félicitations."
congratulations on your wedding
"Proficiat" is how you say congratulations in Flemish.
In Hawaiian, you can say "Ho'omaika'i."
In Latin, you can say "Gratulor," which means congratulations.