ARGH, sorry Anonymous, your guide worked PERFECT – I forgot this in your second code:
<?php
?>
Now all works GREAT and I can just take small pieces of the translation and make my own, where the rest come from the theme.
Let me explain if somebody else can use it one day.
Create the file functions.php and put in this code:
<?php
load_theme_textdomain( 'graphene', get_stylesheet_directory() . '/languages' );
?>
Create the folder languages
in your child theme.
Copy the top of the original po-fil and put it into the top of your new po-file (or download the original one, make changed and make it the new one for the child theme)
Find the text in the original po-file you want to change, it could be like this small translation:
#@ graphene
#: category.php:13
#, php-format
msgid "Category Archive: <span>%s</span>"
msgstr "Kategori arkiv: <span>%s</span>"
I changed it for this:
#@ graphene
#: category.php:13
#, php-format
msgid "Category Archive: <span>%s</span>"
msgstr "Kategorien <span>%s</span>"
When you have changed what you want to change, create a mo-file out of the po-file and upload both to your folder languages
in the child theme
Your are safe 🙂
Kenneth, I also tried the link you send me, but couldn’t make it work – and this time I remembered <?php ?>
🙂
Thanks again to both of you!