SV — El Salvador

El Salvador is the smallest and most densely populated country in Central America, on the Pacific coast. San Salvador is the capital. In 2021, El Salvador became the first country in the world to adopt Bitcoin as legal tender alongside the US Dollar, a landmark event in cryptocurrency history. For developers, the SV country code maps to the es-SV locale for Salvadoran Spanish. The .sv domain and +503 calling code serve Salvadoran digital infrastructure. El Salvador's Bitcoin adoption means applications targeting this market may need to handle both USD and BTC as legal tender — a unique dual-currency requirement that differs from traditional dual-currency systems. The Chivo Wallet government crypto app demonstrated both the potential and challenges of nationwide cryptocurrency adoption. El Salvador uses the USD as its primary currency (since 2001), simplifying traditional currency handling but adding cryptocurrency complexity. The large Salvadoran diaspora in the US makes remittance-focused applications particularly important.