"It is okay" in French is "C'est bien"
"D'accord" is an expression of agreement in French, similar to "okay" in English.
Okay in French is: d'accord
the same : expression
To say "It is okay" in French, you would normally say, "Ça va."
In French, the concept of "expression" is considered to be a feminine noun. So, it is "une expression" (feminine) in French.
d'accord
D'Accord
D'accord.
voila
we say d'accord or okay.
the French use the expression "self-service", which has no French equivalent
yes, it is French.