I had to edit the grub stanza to get english:
linux /vmlinuz0 root=live:LABEL=ROSA_2021.1_PLASMA5_x86_64_41306 ro rd.live.image quiet rhgb rhgb splash=silent logo.nologo lang=en_US inst.lang=en_US.UTF-8 locale.LANG=en_US.UTF-8 locale.LANGUAGE=en_US.UTF-8
Does your Easy2Boot work with this iso?
linux /vmlinuz0 root=live:LABEL=ROSA_2021.1_PLASMA5_x86_64_41306 ro rd.live.image quiet rhgb rhgb splash=silent logo.nologo lang=en_US inst.lang=en_US.UTF-8 locale.LANG=en_US.UTF-8 locale.LANGUAGE=en_US.UTF-8
Does your Easy2Boot work with this iso?