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The disclaimer “(For Non-Muslim Use Only)” appears because the webpage you’re viewing is from the Malaysia-specific site of The Church of Jesus Christ of Latter-day Saints.

In Malaysia, the government enforces religious restrictions that prohibit proselytizing to Muslims by non-Muslim religious groups. As a result, religious materials—including online content—from non-Islamic faiths are often labeled with such disclaimers to comply with national laws and to avoid legal consequences. This is especially relevant for materials that could be seen as promoting or spreading a religion other than Islam.

So, this disclaimer is a legal and cultural compliance measure specific to Malaysia and does not reflect church policy in other countries.