I would say it depends on ServiceOntario worker, but
https://www.ontario.ca/page/exchange-out-province-drivers-licence states that:
"
Proof of driving experience
You can self-declare one year of driving experience, by showing a valid, original foreign driver’s licence.
If you want to earn credit for more than one year of driving experience, you will also need an
official letter from the foreign government or agency that issued the driver’s licence, confirming that the licence is authentic. This letter needs to be written in English or French."