Price, plan and feature changes at Duolingo, Babbel, Rosetta Stone, Busuu, Pimsleur, Memrise, Lingoda, italki, Preply, Speak, Mango and the library-funded apps, lifetime deal windows and their fine print, free access through libraries and schools by state, AI tutor and speech feature launches and accuracy findings, course removals and language delistings, translation earbud and device releases and tests from Google, Apple, Samsung, Timekettle, Pocketalk and Vasco, Google Translate, Apple Translate and DeepL feature changes, offline language pack changes and data and privacy policy changes with opt-outs, with the app or device first and the price in the title.