Taiwanese has an existing writing system available, but the languages of the 350,000 people of Taiwan's aboriginal tribes were originally unwritten, so that the task of writing mother-tongue teaching materials is even more problematic, and it too is dogged by a lack of uniform standards.
閩南語還有文字可用，但是台灣卅五萬名九族山地住民的語言原來就沒有文字，編訂母語教學教材的工作就更麻煩了，也同樣地面臨了標準混淆的問題。