i already saw this issue in the demo. and checked on another machine.
so you can name your avatar, your ship and the marks on the map. as i see the game supports UTF-8 encoding, but for some reason the game is unable to display all the letters correctly in some cases. for example if i name my ship as "áéűő" in most cases the "ű" and "ő" letters will won't show up. i see them only on the map. my guess is that the game use incorrect character encoding in some cases (ex. Windows 1252)
demonstration video: https://streamable.com/kzb1iu