Hello,
F_SalutationXXX is used in Customer Labels, Invoices and Customer Letters. When you design the form for Customer Letters, you put in a field for Salutation 1, 2 or 3, depending on how formal the letter will be. It has nothing to do with grammar, it is to do with how formal or friendly you want to be. Salutation is found in contact record>>comments card.
Best regards
Hansaworld support