Problem: In most Wiktionary projects, words of different languages share a page if their spellings are identical. Currently, the magic word DEFAULTSORT works for an entire page, which means we cannot define a default sort key for each language in the same page. That is an issue especially for Chinese and Japanese. They share characters but their sort keys are totally different (pinyin for Chinese, hiragana for Japanese). If it is allowed to define a default sort key for each section, it will be much easier to correctly categorize pages.
Who would benefit: Editors of Wiktionary, especially those who edit Chinese and Japanese entries.
Proposed solution: Introduction of a new magic word, say, SECTIONSORT, that works for all categories after it up to the next usage of the same magic word. SECTIONSORT should override DEFAULTSORT if both are defined.