@maco@wandering.shop Yes, that's correct in American. Helicopter is a nice example. In American, it's hyphenated as heli-copter, on a syllable break. But in English, it's helico-pter on the two root words (helico - spiral, pter - flying). It's also a nice example because most people hyphenate it incorrectly in English and because it shows how silly a language English is: you can write it correctly only if you know five or so other languages. You can find both exclusion lists in the hypenation package in TeXLive.