"Rest in peace" is "Gorffwys mewn hedd".
The Welsh words for rest in peace is gorwedd mewn hedd.Gorwedd - lie/restMewn - inHeddwch - peace
Gorffwys mewn hedd
Gorffwys mewn hedd nain a taid. (northern Welsh) Gorffwys mewn hedd mamgu a tadcu. (souther Welsh)
Heddwch is peace in welsh
"May her soul rest in peace" = "Möge ihre Seele in Frieden ruhen".
In death may you rest in peace
Rest in Peace - usually on a headstone at a grave in computers it stands for routing information protocol EDIT: You are both wrong, Rest in Peace is just what English speakers say to make it fit, in reality it means Requiescat in Pace, which in Latin means, May he/she lay in peace. But close, and nice job on the computer information.
The Welsh word for "peace" is pronounced "heddwch." It is phonetically pronounced as "heth-oo-ch."
It's spelled "requiescant in pace," and it's Latin for "may they rest in peace"--the R.I.P. on a gravestone (the singular form is "requiescat in pace," "may he (or she) rest in peace").
May he rest in peace .... Ar dheis de go raibh a anam
May god give peace to your soul or May your soul rest in peace (RIP)