Change your language or country with the pickers in the footer, or in Settings → Profile once you've signed in; picking a country also sets your currency and language. There's no separate currency setting.
Steps
Tap your profile picture → Settings → Profile, then tap Country / Region (it shows your country and currency). Not signed in? Tap the country name at the bottom of any page.
"Choose your region" lists countries under Americas, Asia Pacific and Europe, each with its currency. Yours has a check mark.
Tap your country. The page reloads with that country's shops, prices and language.
Want to read in another language? Pick it under Language in Settings → Profile, or in the footer's language picker. Your country stays.
Why did the language change when I picked my country?
That's on purpose: each country comes with its language, or English where Wishpicks doesn't have it (the Netherlands gets English, for example). To switch back, pick your language again in the footer or in Settings → Profile. That keeps your country, except for Português (Brasil), which also sets Brazil.
Why are the prices on my list in different currencies?
Each wish keeps the shop's own currency, and Wishpicks doesn't convert it, so a list can show £, € and ₴ side by side. Changing your country doesn't re-price anything either. If a wish has no shop currency, it uses the one that comes with your country. To change a wish's currency, use the currency code next to its price in Edit wish.
Only the All wishes value card in Wishes → Tracked adds them up, converted into your country's currency.
Does Wishpicks work in my country and language?
Wishpicks works in any country: your lists take links from any online shop, and it comes in Deutsch, English, Español, Français, Italiano, Polski, Português, Português (Brasil), Русский and Українська. Your country decides which shops and prices you see, including the offers in Explore ("What is Explore?").
Why is Wishpicks asking me to choose my region?
The page you opened is set to a different country or language from the one you chose, so Wishpicks asks which to use; whichever you pick becomes your setting. It says "Your account is set to…", or "Your account language is…" under "Choose your language" when only the language differs. People without an account who've picked a country or language before get it too.
Without an account, you may also see "Choose your region to see local stores and prices." Tap the country it suggests, or Other country or region for the full list.
Tips
Pick your country first and your language second, because a new country resets the language.
Choose the country you shop in, not where you're from, since it sets the shops, stock and prices you see. Not listed? Pick the one whose shops you use most.
Signed in? The footer pickers save to your account too, so use whichever is closer.