Always. If you don't you are making a Grammar mistake.
Yes, you should capitalize the first letter of each word in "Thank You" when writing a thank you card as it is a proper noun.
The Paiute phrase for thank you is "Pilamaya."
It should be --- the old Roman cale ndar.
The phrase thank you is an interjection. It is an expression of gratitude.
Thank you in Tagalog: Salamat.
Yes, you should capitalize the first letter of each word in "Thank You" when writing a thank you card as it is a proper noun.
Yes
No.
The Paiute phrase for thank you is "Pilamaya."
No.
It should be --- the old Roman cale ndar.
The phrase thank you is an interjection. It is an expression of gratitude.
No
yes
yes
yes
There actually isn't a specific phrase for thank you, but domo morygotto is roughly translated to thank you.