The language of this graveyard ranges from
A bit of Latin for a former Mayor

from Tony Harrison – V on Rap Genius

Meaning

Traditional Latin quotes and abbreviations are often found on tombstones throughout the world as short epitaphs for the dead. The most popular and well-known abbreviated epitaph is R.I.P., or “Requiescat in pace” (“may s/he rest in peace”), which wishes the departed one a peaceful afterlife.

I.H.S., a Latinized, abbreviated form of Jesus' name, is also frequently found on tombstones.

And may be symbolised like this:

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