The spelling of the word "assche" may seem odd to some, but it is actually a phonetic representation of the Dutch word "as" (axle). The "s" in "assche" is pronounced as a voiceless velar fricative /x/ in IPA, which is similar to the "ch" sound in German "Bach". In Dutch, the letter combination "sch" represents this sound, hence "assche" is a valid spelling. It's important to understand that spellings can differ between languages and dialects, but ultimately it's about accurately capturing the sounds of the language.