Regarding language, I think that I once noticed that Snap causes Easy Installer to inherit the language of the machine on which it is installed.
The experience of @Lonad_West would be useful for comparison, although your log is different from his you might have very similar issues !
While waiting for anyone who might recognise the issue with Easy installer please check out the links in his post regarding KG / RMM Prenormal. In this context, was your phone in use online and with a tested SIM card since you acquired it ? As mentioned in the links above do any clues appear on the Odin mode (Download mode) screen ?
To help you learn where Easy Installer is in the process you might compare with the command line instructions Install /e/OS on a Samsung Galaxy S9+ - “star2lte” – it is still “about to start” installation.