Science Curiosities
What Kind of Word Is It—and What Is It Doing?
A noun is not the same as a subject, and a verb does not always tell the whole story of a sentence. This guide explains the two basic levels of grammar—what kind of word something is and what role it performs—then sho
Who Did What to Whom? How Languages Signal Roles in a Sentence
English relies heavily on word order. Japanese places particles after noun phrases. Hungarian uses case endings. Spanish combines several signals, while Mandarin often depends on word order, constructions, and context
A Word Is Not the Same as Its Role: Understanding Parts of Speech and Sentence Functions
Why can the same noun be the subject in one sentence and the object in another? Is the subject always the person who performs an action? And does every word belong permanently to a single part of speech?
Why We Forget - and Why Spaced Repetition Works
Every learner has encountered this phenomenon: a new word that feels crystal clear today becomes completely inaccessible after a week. While often experienced as a frustrating personal failure, cognitive psychology re
Does “Knowing 5,000 Words” Mean the Same in Every Language? - Part 2.
Does knowing 5,000 words mean the same thing in English, Spanish, Mandarin, Arabic or Japanese? Learn why vocabulary size depends on word families, grammar, morphology and writing systems.
How Should Language Learners Count Vocabulary? A Practical Global Guide
Vocabulary size is useful, but it does not mean the same thing in every language. Learn how to think about words, word families, roots, characters, suffixes and real usage when learning a language.
Vocabulary in Agglutinative Languages: Turkish, Hungarian, Finnish and Korean
In agglutinative languages such as Turkish, Hungarian, Finnish and Korean, words can become long and complex. Learn why vocabulary learning is not just about counting words, but recognizing roots, suffixes and pattern
Vocabulary in Arabic and Semitic Languages: Roots, Patterns and Dialects
Learning Arabic vocabulary is not just about memorizing words. Discover how roots, patterns, Modern Standard Arabic and dialects change what it means to “know” a word.
Vocabulary in Mandarin and Japanese: When “Words” and Writing Systems Do Not Match
Learning Mandarin or Japanese is not only about counting words. Discover why characters, kanji, kana, tones, compounds and word segmentation change how vocabulary knowledge works.
Vocabulary in European Languages: Why Spanish, French, German and Russian Feel Different
Does learning 5,000 words mean the same thing in Spanish, French, German or Russian? Learn how grammar, word families, cognates, cases and compounds change the way vocabulary works in European languages.
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Does “Knowing 5,000 Words” Mean the Same in Every Language?
Does knowing 5,000 words mean the same thing in English, Spanish, Mandarin, Arabic or Japanese? Learn why vocabulary size depends on word families, grammar, morphology and writing systems.