On iOS, we have 32,296,341 reviews, with 3,448,351 being 1 star reviews. 10.67% one star reviews.
Let's see if we limit it to reviews in the last 2 months:
16.47% negative in Turkey (65,154 total reviews) 12.05% negative in the US (1,960,283 total reviews)
(source - internal https://sensortower.com analytics)
It's a bit harder to separate reviews between countries on Android, but we have 7,862,505 recent reviews indexed in the last 2 months on Android, and 780,997 of them are negative (9.93%). I will try to run a query with language detection, though that might take a bit of time~