Leveled and levelled are both English terms. Leveled is predominantly used in 🇺🇸 American (US) English (en-US) while levelled is predominantly used in 🇬🇧 British English (used in UK/AU/NZ) (en-GB). In the United States, there is a preference for " leveled " over "levelled" (98 to 2). More @Wikipedia
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