However, both Javanese and Sundanese also have their own distinct writing systems that are not based on Arabic (https://en.wikipedia.org/wiki/Javanese_script, https://en.wikipedia.org/wiki/Sundanese_script) and would not be at all readable to an Arabic reader.
However, both Javanese and Sundanese also have their own distinct writing systems that are not based on Arabic (https://en.wikipedia.org/wiki/Javanese_script, https://en.wikipedia.org/wiki/Sundanese_script) and would not be at all readable to an Arabic reader.