I had pretty bad acid reflux until I got treated for sleep apnea. Using a CPAP put an end to the reflux (and it's been 25 years now).

Anyway, I had nasty effects from the acid. More than once, I inhaled acid while sleeping. Talk about terrible!

Along the way, my throat would go through varying levels of irritation, from a light scratching to feeling like it was on fire.

So yes, acid reflux can cause a sore throat.