You already know more of the other Slavic languages than you think.
Slovo teaches each of five Slavic languages through the one you know — or through English — by way of Proto-Slavic, the language they all grew from. See which words are shared, which only look shared, and the sound laws that let you guess the rest.
Of the 420 words in Slovo, 21% are cognates between English and Polish.
One word, five shapes
Proto-Slavic *golva 'head' became голова in Russian and Ukrainian, głowa in Polish, hlava in Czech and glava in BCS. Two regular changes explain all of it: pleophony vs liquid metathesis, and g → h.
Sound laws →Words
420Every word in all five languages, with IPA, stress, the Proto-Slavic source and a confidence grade.
Sound laws
14Fourteen regular correspondences, each with worked examples and a one-line decoder.
False friends
54Words that look the same and mean something else — uroda is not урод.
Scripts
Cyrillic and Latin side by side, the national letters, and a live transliterator.
Practice
Spaced-repetition cards and quizzes on false friends and sound laws. Progress stays on your device.