You are already in the right place 
To get the best matching suggestions you should provide real existing examples from your collection. Let us see real, complete filenames, even the currently "wrong" ones.
Let us see screenshots from View -> Extended Tags for real existing files.
Let us know, what exactly is your desired result. With real examples how they should look after using Actions or Converters.
And BTW:
Wir können die Fragen hier auch gerne auf Deutsch beantworten.