How should a judge rule when a player presents a deck with mixed languages at a Nexus Night event, given that rule 420 requires card language consistency?

Ruling: At Nexus Night (casual OPL), don't give a warning the first time this happens due to the casual nature, card scarcity, and potential for unintentional violations. Ask the player to prepare English proxies for non-English cards for next time, or print proxies immediately if the store owner agrees.

Nuances:

• A fully consistent deck in a foreign language (e.g., all Chinese) is legal according to the Tournament Rules
• The violation is specifically about mixing languages within a single deck
• At competitive OPL events like Skirmish, this violation should be reported and enforced
• Consider the judgment call based on how many cards are in a different language
• Card scarcity and misrepresented cards sold as English (but actually Chinese) are mitigating factors for casual events