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Your LimeSurvey version: [CE Version 5.6.28+230627 ]
Own server or LimeSurvey hosting: Own server
Survey theme/template: fruity
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I have a long subquestion in an array type F that runs over two lines when implemented. So the viewer sees manage-ment oder be-come. Words are hyphenated automatically. Can I stop that? Can I make LimeSurvey not to hyphenate?

Hi, this is not LimeSurvey related.
It's your browser.
You can change the behaviour by css.
[url] www.w3schools.com/cssref/css3_pr_hyphens.php [/url]
or
[url] www.w3schools.com/cssref/pr_text_white-space.php [/url]

You may add the desired definition to the ".answer-container". 
Addit to the "custom.css" of your extended theme, or to the special question.

Joffm

Thanks. Why would it be my browser when it happens with other people, too? Can I influence that it not hyphenate on other computers?

The emphasis was on "browser".
It is browser related.
No matter if "your browser", "his browser", "their browser"

I have a long subquestion in an array type F that runs over two lines when implemented. So the viewer sees manage-ment oder be-come. Words are hyphenated automatically. Can I stop that? Can I make LimeSurvey not to hyphenate?

As Joffm says, it is NOT Limesurvey that hyphenates, it is the browser of each users who does that.

Joffm has also posted links that should explain on how to force browsers via CSS not to hyphenate. You will need to adapt the CSS file of your survey theme to stop this behaviour in browsers. If they listen to you. Because it is not uncommon for some browsers not to follow the standards (Yes, I am looking mainly at you, Microsoft...).