The phrase "clothed with the sun" in Greek is "περιβεβλημένη τὸν ἥλιον" (perivevliméni ton ílion), which literally translates to "wearing/enveloped by the sun."
Additionally, if you want to say that something is in Greek, you would use the word "ἐν Ἑλληνικῇ" (en Hellēnikḗ).