Thank you
When someone says congratulations to you, or when someone congratulates you, say, "Thank you".
you could say Thank You
The verb of congratulations is congratulate. As in "to congratulate someone for something".
You can just say "congratulations" you can get them a gift or do something special for them.
It is better to say "congratulations" when congratulating someone because it is the correct plural form. Saying "congratulation" is grammatically incorrect in this context.
Just say "Thanks" or "Thank you" ;)
Thank You
Congratulations on your marriage.
congratulations on.
In Mauritian Creole, you can say "Félicitasion" to congratulate someone.
No, you cannot say, they send their congratulations. You have to say they sent their congratulations.
You could say, "Congratulations on your achievement! I'm so proud of you and all your hard work. Well done!"