I have a visualforce to be rendered as pdf. It displays child records in a table. The language of the rendered pdf is based on a picklist from the parent record.
When the language is set to english, the table displays fine:

When the language is set to german, the table displays distorted:

The respective excerpt of my vf source code:

<!-- Start Discussion Points-->
        <table rules="rows" styleClass="table" cellpadding="4px">
            <tr>
                <td colspan="5"  style="font-weight:bold; text-align: left;font-size:11pt;"> {!$ObjectType.Discussion_Points__c.label}</td>
            </tr>
            <tr>
                <td class="col1"><strong>{!$ObjectType.Discussion_Points__c.fields.Name.label}</strong></td>
                <td class="col34"><strong>{!$ObjectType.Discussion_Points__c.fields.Category__c.label}</strong></td>
                <td class="col2" ><strong>{!$ObjectType.Discussion_Points__c.fields.Summary__c.label}</strong></td>
                <td class="col34"><strong>{!$ObjectType.Discussion_Points__c.fields.Responsible_selection__c.label}</strong></td>
                <td class="col34"><strong>{!$ObjectType.Discussion_Points__c.fields.Due_Date__c.label}</strong></td>
            </tr>
            <!-- Due_Date__c, Internal_use_only__c, No__c, Responsible_contact__c, Responsible_selection__c, Responsible_user__c, Subject__c, Summary__c, Trip_Report__c, Name   -->                                       
            <apex:repeat value="{!TripRepPoints}" var="item">
                <apex:outputpanel rendered="{!NOT(item.internal_use__c)}" >
                    <tr>
                        <td class="col1"><apex:outputfield value="{!item.Name}" /></td>
                        <td class="col34"><apex:outputfield value="{!item.Category__c}" /></td>
                        <td class="col2"><apex:outputfield value="{!item.Summary__c}" /></td>
                        <td class="col34"><apex:outputfield value="{!item.Responsible_company__c}" /></td>
                        <td class="col34"><apex:outputfield value="{!item.Due_Date__c}" /></td>
                    </tr>
                </apex:outputpanel>
            </apex:repeat>
        </table>        
<!-- End Discussion Points-->

And the related css:

.col1 {
 width: 15%;
 vertical-align: top;
 font-weight: bold;
 font-size: 10pt; 
 border-bottom: 1px solid #CCC;
 }
.col2 {
 border-left: 1px solid #CCC;
 border-right: 1px solid #CCC;
 border-bottom: 1px solid #CCC;
 width: 40%;
 font-size: 10pt; 
 vertical-align:top;
 
 }
.col34 {
 border-left: 1px solid #CCC;
 border-bottom: 1px solid #CCC;
 width: 15%;
 font-size: 10pt; 
 vertical-align:top;
 }

Maybe anyone has an idea why this happens?

Many thanks in advance!