📖 The Language Learner's Glossary

The CEFR (Common European Framework of Reference for Languages) is the international standard for describing language ability on a six-level scale: A1 and A2 (basic user), B1 and B2 (independent user), C1 and C2 (proficient user). Courses, exams and job postings across the world describe language skills in CEFR levels.

Comprehensible input is language you can mostly understand even though it's slightly above your current level — often described as 'i+1'. The theory, made famous by linguist Stephen Krashen, holds that we acquire languages primarily by understanding messages, not by memorising rules.

Shadowing is a pronunciation technique where you listen to native audio and repeat what you hear almost simultaneously — trailing the speaker by a beat, like an interpreter. It trains your mouth, rhythm and intonation at the same time, and is one of the fastest known ways to improve your accent.

Spaced repetition is a memory technique that schedules reviews at increasing intervals — just before you would forget. Instead of cramming a word ten times today, you see it today, in three days, next week, then next month. It exploits the 'spacing effect', one of the most replicated findings in memory research.

Active recall is the practice of retrieving information from memory rather than passively re-reading or re-hearing it. Testing yourself — 'what's the word for bread?' — strengthens memory far more than reviewing the answer, a finding known as the testing effect.

Immersion means surrounding yourself with a language so completely that using it becomes necessity rather than study — living where it's spoken, or engineering your daily media, phone settings and conversations so the language fills your environment.

A polyglot is a person who speaks several languages — commonly understood as four or more, learned by choice rather than upbringing. It differs from 'multilingual', which usually describes people raised with multiple languages, and from 'hyperpolyglot', reserved for the rare speakers of a dozen or more.

Cognates are words in different languages that share an origin and remain recognisably similar — like English 'night', German 'Nacht' and Swedish 'natt'. They are free vocabulary: words you effectively already know before you start.

False friends are word pairs that look or sound alike across two languages but mean different things — Spanish 'embarazada' means pregnant, not embarrassed; German 'Gift' means poison, not present. They're the trap hiding inside the gift of cognates.

Fossilization is when an error becomes a permanent habit in a learner's speech — a wrong ending, a misplaced sound, a grammar shortcut — repeated so often, uncorrected, that it hardens into the learner's version of the language, resisting later fixing.

A language exchange (or tandem) pairs two people who each want to learn the other's language — half the conversation in yours, half in theirs. It's free speaking practice with a built-in patient partner, traded rather than bought.

Tones are pitch patterns that change a word's meaning. In tonal languages like Mandarin, Cantonese, Thai and Vietnamese, the syllable 'ma' said with a high pitch, rising pitch, dipping pitch or falling pitch is four different words — pitch is as fundamental as vowels and consonants.

Romanization is writing a language that uses another script in Latin letters — pinyin for Mandarin (你好 → nǐ hǎo), romaji for Japanese (こんにちは → konnichiwa), the Revised Romanization for Korean (안녕하세요 → annyeonghaseyo). It's the on-ramp that lets learners speak before they can read.

Fluency is the ability to express yourself smoothly and comfortably in real time — from Latin 'fluere', to flow. Contrary to the everyday assumption, fluency is not perfection or native-level mastery; linguists use it to describe flow, and many put conversational fluency around CEFR B2.

Code-switching is alternating between two or more languages within a conversation — or a single sentence. Far from laziness, it's a sophisticated skill: multilinguals switch to quote someone exactly, grab the more precise word, or signal belonging to a community that shares both codes.

Language transfer is when habits from a language you already know shape the new one you're learning — helpfully (positive transfer, like Spanish speakers guessing Italian words correctly) or unhelpfully (negative transfer, like English speakers putting adjectives before French nouns).

Diglossia is when a language community uses two varieties side by side: a formal 'high' variety for writing, media and school, and a spoken 'low' variety for daily life. Arabic is the classic case — Modern Standard Arabic in the news, Egyptian or Levantine dialect at the dinner table.

A pitch accent is a system where the melody of a word — which syllable carries high or low pitch — is fixed and can distinguish meanings, but more simply than full tones. Japanese and Swedish are the famous examples: Swedish 'anden' means the duck or the spirit depending on the pitch pattern.

Agglutination is building words by chaining suffixes, each carrying one clear meaning. Turkish is the showcase: ev (house) → evler (houses) → evlerimizden (from our houses). Finnish, Hungarian, Korean and Japanese share the habit. The words look fearsome; the system is remarkably logical.

Mutual intelligibility is when speakers of two different languages can largely understand each other without study — Swedish, Norwegian and Danish are the textbook trio, and Spanish–Portuguese, Czech–Slovak and Hindi–Urdu are other famous pairs. It's the closest thing to a language-learning discount.

The intermediate plateau is the infamous stage — usually around B1 — where progress suddenly feels invisible. Beginner gains were fast and obvious; now hundreds of hours seem to change nothing. It's the point where most long-term learners quit, and it's almost entirely a measurement illusion.

Minimal pairs are two words differing by exactly one sound — ship/sheep, bat/pat. They isolate the sound contrasts a language cares about, which is why they're the classic tool for training both your ear and your pronunciation on distinctions your first language ignores.

Register is how formal or casual your language is — the difference between 'Good evening, might I trouble you…' and 'hey, quick thing'. Every language has registers; some grammar-encode them, like Japanese politeness levels, Korean speech styles, or the tu/vous and du/Sie choices of Europe.

Loanwords are words a language borrows from another and keeps — English took 'croissant' from French and 'karaoke' from Japanese; Japanese took 'pan' (bread) from Portuguese; Turkish is sprinkled with Arabic and French. They're free vocabulary with one hidden catch: the pronunciation adapts.

A heritage speaker grew up hearing a language at home — from parents or grandparents — without full formal education in it. The result is a distinctive profile: native-sounding ears and accent, everyday fluency, but often gaps in literacy, formal registers and 'school' vocabulary.