Hello,

Lets try to understand all your questions one by one

1. images that do not always react when trying to crop/ set aspect ratio.
Could you please provide us a direct example of the image that was not resized correctly? Be sure that you run thumbnails regeneration using this plugin https://wordpress.org/plugins/regenerate-thumbnails/

2. Widget content has changed after changing language from English back to German
Could you please check how it works with default WordPress theme to understand is it our theme issue or not?

3. I asume that attribute Swatches is related to this site, but there is no change if I turn the Button for Use Images from product variations on or off
Sorry, but what is your question here? How should we help you?

4. And high for Filter widget is related to Filters on the sidebar, but nothing changes when I make the high smaller or bigger
What height option do you mean?

5. first, and I thought one could delete icons and words, but obviously not)
Sorry, but this is not quite clear to us either.

Regards