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This is not the first question I've seen you ask about tombstone inscriptions in recent history. If you've lost someone, you have my sincere condolences. || Please don't rely on anything you hear here in practice. We try to avoid practical halachic questions. You might also want to see "Why is it necessary to ask a rabbi?" for more info; please ask a competent halachic authority if you need to know practical answers to these questions.
Like any library, Mi Yodeya offers tons of great information, but does not offer personalized, professional advice, and does not take the place of seeking such advice from your rabbi.