This isn't the actual issue with them, the actual issue is "correlation is not causation". IQ is a normal distribution by definition, but there's no reason to believe the underlying structure is normal.
If some people in the test population got 0s because the test was in English and they didn't speak English, and then everyone else got random results, it'd still correlate with job performance if the job required you to speak English. Wouldn't mean much though.
If some people in the test population got 0s because the test was in English and they didn't speak English, and then everyone else got random results, it'd still correlate with job performance if the job required you to speak English. Wouldn't mean much though.