what's the meaning of ”put off" here?
the fact being born a native English speaker is both a blessing and a curse: 39% are put off by the perception that “most people speak English” and 14% by the idea that “most other languages are not useful”.

Question

Answer

Discouraged or Demotivated. They are put off/decide not to learn the language because of the two reasons.

Don’t miss out on the opportunity to learn a language from the comfort of your own home. Browse our selection of experienced language tutors and enroll in your first lesson now!