Cristina Farroni 

Do I understand you correctly that you are looking for a way to convey to Trados Studio that the below text should not be translated:

Cristina Farroni said:

<table-title>Informationen zum Produkt</table-title>

This is done with inheritance.

Daniel

Cristina Farroni 

If you want sensible assistance with this please provide a sample file.  It should not be difficult for you to create a small sample XML file that contains the structure of all these things you are dealing with but also anonymous text.  For example:

<?xml version="1.0" encoding="UTF-8"?>
<document>
    <!-- Translatable section without readonly attribute -->
    <content>
        <title>Produktbeschreibung</title>
        <paragraph>Dies ist eine Beschreibung des Produkts.</paragraph>
    </content>

    <!-- Non-translatable section with readonly attribute set to true -->
    <readonly_title readonly="true">Produktion</readonly_title>
    <readonly_description readonly="true">
        Dieser Text sollte nicht übersetzt werden, da er als nur-lesbar markiert ist.
    </readonly_description>

    <!-- Table example with mixed content -->
    <table-container ref="g1234556789" id="90000000" type="header" readonly="true">
        <table-title>Informationen zum Produkt</table-title>
        <table hsdl-percent="10.0" type="fixed">
            <row>
                <cell>Produktname</cell>
                <cell>Preis</cell>
            </row>
            <row>
                <cell>Produkt A</cell>
                <cell>€10.00</cell>
            </row>
        </table>
    </table-container>

    <!-- Additional section with translatable DE content and readonly true -->
    <section>
        <title readonly="true">Nur-Lesbarer Titel</title>
        <description readonly="true">Dieser Beschreibungstext ist nicht zu übersetzen.</description>
    </section>

    <!-- Example in another language, should not be translated -->
    <foreign_content readonly="true">
        <title>Titre du produit</title>
        <paragraph>Ceci est une description du produit en français.</paragraph>
    </foreign_content>
</document>

So far there is insufficient information from you to get a sensible answer.  Without that how do we know if the ST4 settings can identify the target language sections explicitly, or if they rely solely on the readonly attribute for example?  You will get much better help if you explain your problem with enough info for someone to help.