KLettres
Learn the alphabet and read syllables
KLettres helps children and adults learn the alphabet and then read
syllables in various languages. It shows a letter or syllable and plays
its sound, then the user types what they heard.
Supports many languages including English, French, German, Czech,
Slovak, Spanish, Dutch, and others. Features two levels of difficulty.
Home page: https://apps.kde.org/klettres/