my advice would be pick a topic on the course that is commonly asked in opinion pieces eg environment, inequality, sport, etc and write 1 page about it. nothing too complex and nothing over 1.5 pages. you can then write it in french. its not that much work in my opinion. it took me 2 hours to write my first draft
just talk about something that interests you. I'm probably gonna do my year in France. Make it personal so that it's something actually unique. The examiner will be sick of hearing the same stuff spat out by a hundred students
Yes! The doccument is a great way to get marks especially if you feel like you arent the best at french. And do not listen to people telling you to make it something complicated etc. The examier does not care if you do the same thing as the whole of Ireland, or you do something unique. It will just cause the examiner to ask questions you probably haven't prepared for and bring your overall marks down.