This is the technical support forum for WPML - the multilingual WordPress plugin.
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This thread is resolved. Here is a description of the problem and solution.
The problem: All the strings that are part of WordPress are missing for a certain language. The solution: You can go to WPML > Theme and plugin localization. Check that "Translate by WPML" is selected; if not, select it and save. After that, check that "WPML will automatically download translations for WordPress" is selected; if not, select it and save again. Then you will see a list of the languages and maybe something like: "File not found!", next to it: "Updates available" and a button to review changes and update. Press it and it will load a new screen. At the bottom there is a checkbox and a button. Select it and press the button. There is also other option if you have followed the above steps. There is a link "Check Now" that will produce the mentioned review and update button if it is missing.