I know that it has been several times before, but maybe from ready examples it will be easier to tease. Some variables that would make life easier for DE users.... and wouldn't have to be modified manually after each update:

Invoice -> Rechnung
Tax -> MWSt.
Total -> Brutto
Subtotal -> Netto
Quote -> Angebot

# diff quote.php-2025-01-26 quote.php-2025-01-26.org
190c190
< <a class="dropdown-item" href="#" onclick="pdfMake.createPdf(docDefinition).download('<?php echo strtoAZaz09(html_entity_decode("$quote_date-$company_name-$client_name-Angebot-$quote_prefix$quote_number")); ?>');">
---

                             <a class="dropdown-item" href="#" onclick="pdfMake.createPdf(docDefinition).download('<?php echo strtoAZaz09(html_entity_decode("$quote_date-$company_name-$client_name-Quote-$quote_prefix$quote_number")); ?>');">
225c225
<                     <h3 class="text-right mt-5"><strong>Angebot</strong><br><small class="text-secondary"><?php echo "$quote_prefix$quote_number"; ?></small></h3>
---
                     <h3 class="text-right mt-5"><strong>Quote</strong><br><small class="text-secondary"><?php echo "$quote_prefix$quote_number"; ?></small></h3>
576c576
<             title: <?php echo json_encode(html_entity_decode($company_name) . "- Angebot") ?>,
---
             title: <?php echo json_encode(html_entity_decode($company_name) . "- Quote") ?>,
593c593
<                         text: 'Angebot',
---
                         text: 'Quote',

# diff invoice.php-2025-01-26.org invoice.php-2025-01-26
246c246
< <a class="dropdown-item" href="#" onclick="pdfMake.createPdf(docDefinition).download('<?php echo strtoAZaz09(html_entity_decode("$invoice_date-$company_name-$client_name-Invoice-$invoice_prefix$invoice_number")); ?>');">
---

                             <a class="dropdown-item" href="#" onclick="pdfMake.createPdf(docDefinition).download('<?php echo strtoAZaz09(html_entity_decode("$invoice_date-$company_name-$client_name-Rechnung-$invoice_prefix$invoice_number")); ?>');">
284c284
<                     <h3 class="text-right mt-5"><strong>Invoice</strong><br><small class="text-secondary"><?php echo "$invoice_prefix$invoice_number"; ?></small></h3>
---
                     <h3 class="text-right mt-5"><strong>Rechnung</strong><br><small class="text-secondary"><?php echo "$invoice_prefix$invoice_number"; ?></small></h3>
341c341
<                                     <th class="text-right">Tax</th>
---
                                     <th class="text-right">MwSt.</th>
481c481
<                             <td>Subtotal</td>
---
                             <td>Netto</td>
496c496
<                                 <td>Tax</td>
---
                                 <td>MwSt.</td>
501c501
<                             <td>Total</td>
---
                             <td>Brutto</td>
729c729
<             title: <?php echo json_encode(html_entity_decode($company_name) . "- Invoice") ?>,
---
             title: <?php echo json_encode(html_entity_decode($company_name) . "- Rechnung") ?>,
748c748
<                             text: 'Invoice',
---
                             text: 'Rechnung',
856c856
<                                 text: 'Tax',
---
                                 text: 'MWSt.',
860c860
<                                 text: 'Total',
---
                                 text: 'Brutto',
947c947
<                                 text: 'Subtotal',
---
                                 text: 'Netto',
972c972
<                                 text: 'Tax',
---
                                 text: 'MwSt.',
984c984
<                                 text: 'Total',
---
                                 text: 'Brutto',