How to change text in all posts

maybe this could help you – put it in your functions.php of your child-theme:

// Word replacement
function replace_text($word){
    $changings = array(
	// Word to replace => New text - comma separated
        'Grundlagen' => 'Basis',
	'dolor' => 'something else'
    );
    $word = str_replace(array_keys($changings), $changings, $word);
    return $word;
}

// WP filter for the content and the Exerpt (content excerpt)

add_filter('the_content', 'replace_text');
add_filter('the_excerpt', 'replace_text');

you see how it works ?
this is what you like to replace: 'Grundlagen' => 'Basis',
if you like to replace more these lines are separated by commata – the last instruction does not need a comma at the end

by the way you can even replace with html expressions:

'Lorem' => '<abbr title="#">Lorem</abbr>',

PS: this will work case-sensitve

but yes of course – but

I prefer it of course if it runs here over the forum, because I do not always have time to deal directly with the questions. Furthermore, the advantage of swarm intelligence should not be underestimated.

click on my nick or avatar