I was going through this answer here, where @JasonCraig ends the answer with:
Later a huge portion of issues are sorted in the editing table.
So, I wanted to know what are the editing methods used to cover-up for the lip-sync of non-native artists?
He also mentions some techniques used while shooting, which are:
For lip-sync, actors mumble to themselves, if actors are not native speaker and a close up of actors singing is involved in the worst case, directors ask them to say "abcd" or something close to those lyrics, and will be concealed through camera angles to give viewers an impression that they are indeed singing.
However, he wasn't clear/specific about the techniques. So, what are the techniques (along with the name if possible) used while shooting for covering up lip-sync of non-native actors?