In a job application case for a call center position, all customer service agents must...

In a job application case for a call center position, all customer service agents must speak English, but positions for Spanish, French, and German speakers are also available. During the interview process illustrated below, the Conduct Interview assignment task must be routed to an interview who speaks the same language as the applicant.

What is the best way to design routing so the correct interviewer is assigned the task?