One of the nicest things about the online corpus tools I develop and maintain is that I get questions and suggestions from (a whole range of) researchers around the globe. This time, someone asked me to include the option to remove spanish interpunction at the start of a word/sentence, like ¿ and ¡ and an option to include or exclude diacritics like ø, ö and characters such as ß – the German 'sharp' or 'double S'. The script already filtered out these characters, but in a rather crude way: a word like schön simply became schon, and äh even became a single letter, h, which is strange (and incorrect) to see in the results.
Inverted question mark and exclamation mark
With this update, characters can be either kept (schön stays schön), or replaced (schön becomes schon). The update is live, so if you're interested, head over to https://www.reuneker.nl/files/wordlist.