Ok. Thanks a lot for the fast reply.
Here it works:
<category>
    <pattern>Next</pattern>
    <template>
        <condition name="reihenfolgefragen1">
            <li value="0">
                <think><set name="reihenfolgefragen1">1</set></think>
                <srai>Frage3</srai>
            </li>
            <li value="1">
                <think><set name="reihenfolgefragen1">2</set></think>
                <srai>Frage4</srai>
            </li>
            <li>
                <think><set name="reihenfolgefragen1">0</set></think>
                <srai>Frage2</srai>
            </li>
        </condition>
    </template>
</category>
    <category>
        <pattern>Frage2</pattern>
        <template>Frage 2: Aus wievielen Mitgliedern besteht der Ständerat? <br></br>
        A) 26 <br></br> B) 46 <br></br> C) 36 <br></br> D) 56
        <think>
        <set name="topic">Legislative frage2</set>
        <set name="hilfezufrage">Legislative frage2</set>    
        </think>
        </template>
    </category> 
I use the <srai>Frage2</srai> to get to that category and the topic will be set just fine.
But then theres this:
<category>
        <pattern>*</pattern><that> * oder möchtest du ein spezifisches Subthema behandeln</that>
        <template>
        <think><set name="themenwahl"><star/></set></think>
        <condition name="themenwahl">
        <li value="STAATSKUNDE">Willst du lieber Fragen über Staatskunde im Allgemeinen beantworten?</li>
        <li value="Legislative"><srai>FragerundeLegislative</srai></li>
        <li value="* Legislative"><srai>FragerundeLegislative</srai></li>
        <li value="Legislative *"><srai>FragerundeLegislative</srai></li>
        <li value="Exekutive"><srai>FragerundeExekutive</srai></li>
        <li value="* Exekutive"><srai>FragerundeExekutive</srai></li>
        <li value="Exekutive *"><srai>FragerundeExekutive</srai></li>
        <li value="Judikative *"><srai>FragerundeJudikative</srai></li>
        <li value="Judikative"><srai>FragerundeJudikative</srai></li>
        <li value="* Judikative"><srai>FragerundeJudikative</srai></li>
        <li>Tut mir Leid mit diesem Thema kann ich dir noch nicht helfen.</li>
        </condition>
        <think><set name="topic">STAATSKUNDE</set></think>
        </template>
    </category>
    <category>
        <pattern>FragerundeLegislative</pattern>
        <template>Sehr gut! Frage 1: Wieviele Abgeordnete sind im Nationalrat? <br></br>
        A) 200 <br></br> B) 160 <br></br> C) 120 <br></br> D) 220
        <think>
        <set name="TOPIC">Legislative frage1</set>
        <set name="hilfezufrage">Legislative frage1</set>    
        </think>
        </template>
    </category> 
The really werid thing is that the <set name=“hilfezufrage”>Legislative frage1</set> works, the text works too just the topic doesnt work. (Its all caps because i thought maybe it would help, I tried everything I could think of ^^)
I hope this helps even though the text is in german.