The Prince’s Bargain by K.M. Shea

When Prince Arvel was declared the heir to the throne, he was ignorant of all the forthcoming unpleasantness the title would bring him. Nobles who used to ignore him now seek to manipulate and control him. Even worse, his attendance is mandatory at every social function and party.
Every. Party.

So when the time comes for an elf translator to be assigned to him, Arvel jumps at the chance to get closer to the beautiful female translator he has seen studying in the library at all hours of the day.
Myth, a mere translator with a knack for languages, never expected to be yanked into the secret power struggle between the human nobles. But once she is given the assignment of Translator to Prince Arvel, she discovers danger can lurk in dazzling ballrooms and inane social exchanges.

As an elf ignorant to human customs, Myth feels woefully unprepared for her new role. No matter how much she studies, books can’t tell her how to survive a prince who is too charming and warm, or the traitorous nobles who seek to harm him.
When Myth is attacked, Arvel realizes there’s nothing he won’t do to see that she is made safe again. But to outwit his enemies, he’ll need Myth’s help and language skills.
They have gone through their lives being competent and self-reliant. But if they can work together, they and their people will never be the same.