No valid and trusted OpenPGP key was found for "%1". Select the key(s) which should be used for this recipient.
Ni chanfuwyd allwedd OpenPGP ddilys ac ymddiriedig ar gyfer "% 1". Dewiswch yr allwedd( au) a ddylir eu defnyddio ar gyfer y derbyniwr yma. if in your language something like 'key( s)' isn' t possible please use the plural in the translation