My thanks to this guide: https://web.archive.org/web/20220914142532/https://gist.github.com/eladkarako/0c23ce1157b4c6175817c78a7adb577f
someone linked to it but it was not available anymore... so I looked it up on the WaybackMachine and there was ONE snapshot so... lucky
Second side note: the guide tells you to also embed "slc.dll" into the .exe but it's not actually necessary, just embed "<program name>.exe.mui" from en_US to the .exe and that's it