beta2 with updates, performing bootnet kickstart install. Kickstart file used is in #49617, with the difference that "interactive" was uncommented, ie. active. When using interactive mode, the installer asks for language and keyboard type before going onward. At least keyboard type is not "set by default" corrently; I specified it to be fi-latin1, but the default selection was 'us' or the like. I believe the same happens with language. Couldn't test interactive further due to other issues (#49617).
Language type is being set to the right default for me with the test ks.cfg I just threw together. Your kickstart config had language set to en_US, hence why it used that. Keyboard wasn't properly being handled and is now fixed in CVS.