But it will be difficult for you to show any genuine interest in the position if you know nothing about the institution. Your performance here is a crucial factor, often determining whether or not you are invited on campus. No college or university wants to go to the expense of bringing a candidate to its campus who is not serious about the job. If you really want it, show some enthusiasm. If not, you should still try to do a good interview.
Memories are long.
It is always advisable to leave people with a positive impression. You have absolutely nothing to gain by responding in kind. Be prepared for interviews conducted both in English and in the language you teach. A fluent, accurate command of both is a minimum requirement in nearly all modern language departments. Some candidates feel that any institution will be lucky to get them, and that may be true.