Stripe is opinionated: a Price object has one currency. If your product is priced at $79 USD, that's what Stripe charges. But for conversion optimization, you want to display the price in the visitor's local currency — Argentinians see ARS, Brazilians see BRL, Germans see EUR — converted at the live FX rate. The math is simple. The trick is doing it without a 200ms client-side flash. The architecture Stripe holds the canonical price (USD) — never change this. At request time, detect visitor country (IP-based, server side). Look up the local currency for that country. Fetch the live USD->X rate for that currency. Render "$79 USD ≈ AR$ {price * rate}" on the page. When the user clicks "Buy", Stripe still charges in USD. The conversion was display-only. This pattern is conversion-friendly (visitor sees comfortable numbers) AND chargeback-safe (Stripe records what they actually paid).…