@irena:
Hi there!
We are only allowed to use English language here, sorry, I cannot do anything about it.
Back to your topic:
You cannot change this text other than via the translation file itself. You have to take the .po file from the plugin folder /wc-pomo/
sie- oder du-version and then change with Poedit Editor ( https://www.poedit.net/download.php ) the strings you want. After that upload the modified .po and .mo file that was created/updated from Poedit to a new location (via FTP):
/wp-content/languages/woocommerce-de/custom/woocommerce-de_DE.mo
/wp-content/languages/woocommerce-de/custom/woocommerce-admin-de_DE.mo
Be aware that you have to maintain then these lang files from that point onwards if there are updates from WooCommerce.
Other alternative:
change the button size/ font size via the CSS styling of your theme to make it fit with your design.
I hope that helps.
Thanks, Dave ??