Expedia Group interview questions

The supervisor was 15 minutes late and the second manager came after interview has started. The supervisor has presented the company and described the position in general - B2B support, work from Monday till Friday, two shifts... The supervisor and manager asked me why I am looking for another work and my opinion about customer support in general. Next question was about difficult customers and how can I handle a really unsatisfied customer. After all questions they asked me if I have any question. I asked about salary and they have looked each other, the supervisor smiled and said he isn't sure about it. Except the first 5 minutes of the conversation (it was in language of the supported region - the main language needed for the position) all conversation was in English. I am fluent in the language of the supported region but I am no native speaker, so it was little bit strange that the supervisor evaluated it after the first 5 minutes. After the end of the interview the supervisor escorted me to the lift and wished me good luck. After some days I have received the response - they have found a more suitable candidate. After 4 months Expedia is still looking for an employee for this position. I have applied again later - no response. I am not sure about reason of the negative response but I suspect nation discrimination.