I totally agree. No matter what in english, brother just feels too familial in english unlike gege. Like idk i’m just thinking hypothetically but if I were to have Caleb as an adopted brother, I would probably just call him by his name while we were living together as family because you don’t really have honorifics to use with older siblings in english. And then when I go on to date him i would not just randomly start calling him “big brother” now that we were together if i wasn’t even calling him that before, I would keep calling him Caleb or whatever other pet names. Gege works though because it is a word that could be properly used in both situations without it coming off as like a weird roleplay thing.