SL — Sierra Leone

Sierra Leone is a West African country on the Atlantic coast, named by Portuguese explorers for its mountainous peninsula ('Lion Mountains'). Freetown, the capital, was founded in 1792 as a settlement for freed slaves. The Sierra Leonean Leone recently changed its currency code from SLL to SLE in 2022 following a redenomination where 1,000 old Leones became 1 new Leone. For developers, the SL country code maps to the en-SL locale for Sierra Leonean English, which has a distinctive Krio-influenced character. The .sl domain and +232 calling code serve Sierra Leone's digital infrastructure. The 2022 currency redenomination from SLL to SLE is the most recent example of an African currency code change, requiring updates to financial databases and payment systems. This transition period where both old and new codes may be in use makes currency code validation particularly important for applications handling Sierra Leonean financial data.