So I live in Spain but a few days ago I was in Hungary for the Ingress anomaly. I am back in Spain now.
But now all the reviews I get are in Hungarian (I think). For example: "Kríž s nápisom INRI, vyobrazujúci ukrižovaného Ježiša Krista. Pod Ježišom je napís “ŽEHNAJ BOŽE ŤAŽKEJ PRÁCI ROĽNÍKA”
My Hometown is in Spain and my Bonus is in the UK.
Any ideas?
(Edit: spontaneously resolved shortly after posting.)
I think if you interact with something in Ingress now that you are back home, it should reset you but @tehstone understands this stuff better than I do.
Well that’s weird.
I’ve been playing Ingress every day since I got back.
But after posting this it just fixed itself.
Coincidence? I don’t think so!
It’ll give you the place you’ve been in the past few days. Especially if that place has a backlog. Or if it doesn’t have enough reviewers - they don’t want one group to get enough power that they’could start making their own rules. And they’d rather have someone who has at least a brief general idea of the culture there.
Coincidence. And, it is entirely possible that you had to finish reviewing the few things you had been assigned from there first 
The example you shared is from Czechia or Slovakia.
For the future, if you traveled but your Wayfarer location is not updating, play every game connected to your account for a bit (yes, even the ones that don’t have submissions too), do a few reviews and it should snap back.