There is something very particular in living a tri-lingual life, it's that I'm often confused in which language to take personal notes.
For work it's easy, mostly in English. About my kid it's mostly in German. And French everywhere in between. My calendar events are a mess, my bookmarks are a mess, my contacts are a mess.
This is ok till I need to look for something specific, because if I look for the word in the wrong language I won't find anything.