Changing language in QuakeSpasm (and QS-Spiked)

Ironwail lets me change the language of the in-game messages in Dimension of the Machine with the “language” command. Is there a similar command in QuakeSpasm and QuakeSpasm-Spiked?

I can probably do it the dirty way by renaming the localization files in “QuakeEX.kpf”, but I’d like to know if there is a proper way. (EDIT: The dirty way is also not great because foreign characters are not recognized.)