Renas,
What language are you using? Those stringe are definitely included in the en_GB file and should be in any of the other language files we include. Even if our language file doesn't include it for some reason, the en_GB file should be used as a fallback, so I'm not sure why it's not showing anything.
Either way, I'd recommend adding those strings to your language file (or copy them from the en_GB file) and that should fix your strings.
Thanks,
Alex