> Can an English speaking tourist manage in these parts of [name-redacted]?

Absolutely.

According to Wikipedia, 86% of people in [name-redacted] know English. The percentage will of course be smaller in countryside and among older people, but I don't think you can find a small town where at least 50% of people wouldn't know English.

I would say yes. I don't know this for sure but the level of english is good all over [name-redacted]. People might be a bit unprepared and shy but they will understand and reply in some way.

Yes, I would say that the population below 60, almost all speak English, for below 40 you have almost full working proficiency in English.