Work permit issues

Hi guys !

I would like to ask if Taiwan government doesn’t issue work permit for this role to anyone except those holding a passport from what it considers to be English-speaking countries, namely, Australia, Canada, Ireland, New Zealand, South Africa, the United Kingdom and the United States ?

I applied for a post with one of the papers and I was told that whose native language is English, but who hail from other countries, like Singapore, are ineligible for work permit.

Can I check if there is any relevant Taiwan law to it ?

Many thanks in advance !