function araby.is_arabicword somwtimes return true for a sentence without spaces

[esluvleil10]

When spaces are deliberately removed from a sentence like "'حطتخطاياهولوكانتمثلزبدالبحر" which is originally "'حطت خطاياه ولوكانت مثل زبد البحر", the function will return True

[linuxscout]

Thank you for your remark,
there is a problem to fix the max length of an arabic valid word, because we can have long words with only letters, and the length will be doubled if diacritics are added.