Honestly I feel it is fine at the moment as it is, I think breaking it up would make the overall experience more disjointed. We as international players are extremely lucky that so many Polish dispatchers and drivers speak English and are happy for us to do so, I must say it's very impressive. I feel it should be more a responsibility of mine to learn more Polish but for now I am happy to use Google translate, I haven't had any issues either as a dispatcher or a driver.
For me personally I'd probably still use PL1 even if an English server was made, and 2 of my friends are the same.
Thanks for everything you do for free, I will also be planning to donate in the near future 😀