There are several remaining issues about RTL support in the Wikidata Query Service UI, pointed out by @Smalyshev and @eranroz in T171564:
- Splitter - dragging left moves it right and vise versa (T189972)
- Dropdown menus show left alignment (it may be valid for "tools", as tools have Latin names, and wrong for "help") (T189971)
- X of the query helper should float left not right
- Some RTL languages (Arabic, Persian) mirror the question mark for help. In others (Hebrew, Yiddish) the question mark is the same as in LTR languages (e.g currently shows correct) (T189975)
- T186365: In Wikidata Query tool the filter tooltip arrow looks broken in RTL languages