Please alternate the following diacritics to each a and e: accent grave, accent aigu and umlaut, but please alternate them to make it look esthetically pleasing.

For the o and u, I would only use umlauts. Not a big fan of accents on o and u. Don't know why, but there's something about it that makes me maaaaaaaad! Oh, and please: don't use two identical diacritics after each other. That's just silly.

If you want to use a å or ø, I would suggest random entries, but don't overuse them. They are for special occasions. Like a birthday. 

Quoting bbbbb:

Quote:
today I've watched La vie d'Adèle - Chapitres 1 et 2.

A romance movie. Can someone tell me if and where to add diacritics?

Just use the link you gave yourself. Everything is perfectly correct on this page.