hebrew not showing up

i installed the plugin, but when i click “dashboard language” at the top of my dashboard, i only see english as an option. i went to general settings, and set the website language to “hebrew”, but still only english is showing up as an option. how do i get hebrew to show up as an option under “dashboard language”?

thanks!

https://ww.wp.xz.cn/plugins/r3df-dashboard-language-switcher/