hey yoluca,
for your backend-pics (es2 and es3) it's actually right, even while looking a little bit weird. these placeholders will be replaced by the text in the language files when viewing in the frontend. if you would enter "normal" text in there then it wouldn't be possible to translate it to other languages but the entered text would display the same on all languages.
for the other 2 pics it looks as these strings are missing in the language files. have you updated through the auto-updater? we noticed similar problems when doing so and decided to do a re-install with the launcher package - after that manual install our language problems have gone, so perhaps you wanna give this a try as well?
hope that helps