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Research-backed playbooks on spaced repetition, memory, CEFR levels and the words that matter — from the team building the vocabulary trainer.
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What Is Spaced Repetition? The Science of Remembering More in Less Time
Spaced repetition is the most efficient way to memorize vocabulary. Learn how the forgetting curve works, why cramming fails, and the simple review schedule that makes thousands of words stick.
Present Perfect vs Past Simple: Which One to Use (and Why)
Present Perfect or Past Simple? One question settles it: is the time finished? Clear rules, signal words, common mistakes and examples.
Polish Cases Explained: What All Seven Actually Do
Mianownik to wołacz — what each of the seven Polish cases does, the endings to learn first, the negation trap, and a sane order to learn them in.
Il, Lo, La: How Italian Definite Articles Actually Work
Il, lo, la, i, gli, le — Italian has seven words for 'the'. The sound rule that picks between them, the combined prepositions, and how to stop guessing.
Passé Composé vs Imparfait: Which French Past Tense to Use
Passé composé or imparfait? The photo-vs-film rule, the trigger words, the verbs that change meaning, and how to make the choice automatic.
German Cases Explained: Nominativ, Akkusativ, Dativ and Genitiv
What each German case does, the der/den/dem table worth memorizing, the two-way preposition rule, and how to make the accusative-or-dative choice automatic.
Por vs Para: The Difference, Explained With a Rule That Sticks
Por and para both mean 'for' — but they do different jobs. The goal-vs-reason rule, the pairs that flip meaning, and how to drill it until it's automatic.
Russian Cases Explained: What All Six Actually Do
Nominative, genitive, dative, accusative, instrumental, prepositional — what each Russian case does, the endings to learn first, and a sane order to learn them.
English Irregular Verbs: Learn the Patterns, Not the Alphabetical List
Most English irregular verbs follow one of seven patterns. The groups explained, the 20 verbs to learn first, and the drill that makes go–went–gone automatic.
The Georgian Alphabet: How to Read Mkhedruli in One Week
All 33 Georgian letters explained: where Mkhedruli comes from, how ejectives work, and a simple 7-day plan to go from zero to reading real Georgian.
Essere or Avere? How to Pick the Right Auxiliary in the Passato Prossimo
Essere or avere in the passato prossimo? The direct-object test, the full list of essere verbs, the ones that switch sides — and how to make the choice automatic.
Le or La? How to Know a French Noun's Gender (Without Guessing)
Every French noun is masculine or feminine — but the ending usually gives it away. The reliable patterns, the exceptions worth memorizing, and how to make le vs la automatic.
Polish Comparatives and Superlatives: A Simple Guide to Stopniowanie
Bigger, better, the best — how Polish adjectives change for comparison. The three ways to form the comparative and superlative, the irregulars worth memorizing, and how to practice them.
How to Learn Polish Vocabulary Fast (Without Burning Out)
A realistic 20-minutes-a-day plan for building Polish vocabulary with spaced repetition — which words to learn first, how to handle cases and spelling, and how to stay consistent.
How Many Words Do You Need to Be Fluent? A Data-Backed Answer
2,000 words? 10,000? Here are the honest numbers for getting by, holding a conversation, and reaching fluency in a new language — and why which words you learn matters more than how many.
The Forgetting Curve: Why You Lose New Words (and How to Stop)
Hermann Ebbinghaus mapped how memory fades in 1885. Here's what the forgetting curve actually shows, the myths around it, and how to use spaced reviews to flatten it for good.
Ser vs Estar: When to Use Each (With a Rule That Actually Works)
Ser and estar both mean 'to be' in Spanish — but they're not interchangeable. The identity-vs-state rule, the key exceptions, and how to drill it until it sticks.
Der, Die, Das: How to Actually Guess German Noun Genders
German noun genders feel random — but they're not. Here are the reliable der/die/das rules, the endings that give gender away, and the smart way to learn it: with the article baked in.
A1 to C2 Explained: What Each CEFR Level Really Means
The CEFR levels (A1, A2, B1, B2, C1, C2) decoded in plain English — what you can do at each stage, how many words you need, and how to tell which level you're at right now.
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