Question Author
APG, I decided to leave the group, but a friend of mine belongs to the same group and she was getting the same posts, so I explained what you advised, and when she did that she got Remove this notification which she clicked onto, but she didn't get Turn off these notifications/report, so she will have to see what happens now. If she stops getting further notifications from that Arabic group, I will join again and follow your instructions.
Many thanks.