The hiring authority wants to know if you are applying to any competitors for several reasons. First, they want to see which brands you have an interest in. Second, it's relevant data for a company to gather for competitive talent acquisition. Third, the interviewer would like to know what kind of time frame they are operating in for your interview process and a potential job offer.

You are under no obligation to disclose every detail of your job search. With that said, it is a professional courtesy to let Pernod-Ricard SA know if you are in the final stages with other organizations. The interviewer will have a folder with all the resumes of the candidates they are interviewing and their questions and notes from each interview, which they'll refer to later when making a decision. You should have something similar for all the interviews you've performed. Detail, for your eyes only, what each of them has to offer and what you offer them. Have tabs separating your notes for each interview, with a breakdown of the pro and cons of each employer. Having this with you will present you as an organized professional, taking all your prospects seriously, and help market you as a viable candidate.