SpecEnvoy Languages
Interactive, in-browser tools to actually grow a language — read with audio, drill vocabulary, practise writing and pronunciation, and build sentences. Free; nothing to install.
Available now
中文 Chinese
Mandarin · simplified — reading, writing, tones & sentences
Five tools for Mandarin: Read-Along (pinyin + audio), smart Flashcards, stroke-order Writing, a Tones ear-trainer, and a Sentence Builder. A general, graded word bank built for heritage and beginning learners, with classic poems every child learns.
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More languages may follow — the tools are built to be reused.