Same app, same price tier. Why would one language pay 5x more than another?

Looking at who pays in my app, the split by language surprised me. Spanish-speaking users convert at around 12%, Arabic-speaking users at about 2.5%, even though Arabic users found the app on their own and used it a lot.

I never localized the store page for either.

Is this mostly purchasing power, store pricing tiers by country, or trust in a small unknown app?

If you sell globally, did you change prices or offers per country, and did it help?