Using aria-expanded without a fallback is the recommended approach for accessible toggle controls. Adding visually hidden text as a fallback introduces maintenance burden, inconsistent non-standard strings, no automatic localization, and redundant announcements for most screen reader users. Since aria-expanded is well supported across major assistive technologies (JAWS, NVDA, VoiceOver, Narrator), a fallback solves a problem for very few users while creating issues for the majority.
