How can I set the character to Latn-1 or MCS when using serial-getty?

I'd like to use my old VT420 terminal as system console. Adding RS232 ports and setting up serial-getty are not a problem, but: For years, almost all Linux distros have been using UTF-8 as the standard character set, whereas the VT only speaks Latin-1 (ISO 8859-1) and the old DEC multinational character set. So: What can I do to make serial-getty use one of the character sets supported by the terminal? Is there an easy-to-implement solution for that? My current distros are: - OpenSuSE Leap 15.6 - OpenWRT, current version Please note that the VT420 does allow to define custom (bitmap) characters, but this is hard work.