qtgui: fix i18n

[markus2330]

Basics

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Do not describe the purpose of this PR in the PR description but:

• Short descriptions should be in the release notes (added as entry in
  doc/news/_preparation_next_release.md which contains _(my name)_)
  Please always add something to the the release notes.
• Longer descriptions should be in documentation or in design decisions.
• Describe details of how you changed the code in commit messages
  (first line should have module: short statement syntax)
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Checklist

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For docu fixes, spell checking, and similar none of these points below
need to be checked.

• I added unit tests
• I ran all tests locally and everything went fine
• affected documentation is fixed
• I added code comments, logging, and assertions (see Coding Guidelines)
• meta data is updated (e.g. README.md of plugins and METADATA.ini)

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• Code is conforming to our Coding Guidelines
• APIs are conforming to our Design Guidelines
• Code is consistent to our Design Decisions
• Documentation is concise and good to read
• Examples are well chosen and understandable

Labels

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[markus2330]

@darddan: here is an old code that tried to fix the translation. Maybe you can start with this? Do you speak some other language next to german/english? Maybe you can also add one more translation?

[markus2330]

@darddan I readded you to ElektraInitiative. Does this PR work for you? Can you rebase and fix it?

[markus2330]

@darddan I readded you to ElektraInitiative. Does this PR work for you? Can you rebase and fix it?

[stale]

I mark this stale as it did not have any activity for one year. I'll close it in two weeks if no further activity occurs. If you want it to be alive again, ping by writing a message here or create a new issue/PR with the remainder of this issue/PR.
Thank you for your contributions 💖