What is language and what do linguists study?
Language is a system of signs we share. Linguists sort it into layers: sounds (phonetics and phonology), words and their parts (morphology), sentences (syntax), meaning (semantics) and use in life (pragmatics: how context changes meaning, e.g. "Can you pass the salt?" is a request, not a question about ability).
To observe and classify, pick a unit (a sound, a word, a sentence) and ask which layer it belongs to.
Language and thought. Does language shape thought? A mild yes. Russian has two basic words for blue (light and dark) and speakers are a little quicker to tell those shades apart. Language guides attention; it does not lock the mind.
Varieties: dialects, sociolects and registers
No language is one single thing. A dialect is a variety linked to a place (Hindi in Delhi vs Bhojpuri-tinged Hindi). A sociolect is a variety linked to a group (age, work, class). A register is how you speak in a situation (formal letter vs voice note to a friend). A standard is just the variety chosen for schools and news; it is not "better".
The line between a language and a dialect is often social, not purely linguistic. Understanding between speakers helps, but history and identity matter too. Multilingualism means using more than one language; it is normal in most of the world.
Language change: digital media, loanwords, youth language
All living languages change: sounds shift, words are born, meanings drift. Latin mater became Spanish madre in small steps over centuries.
- Borrowing: English got jungle, shampoo, pyjamas from Indian languages; Hindi uses school, phone. German and other languages borrow English words (anglicisms) for new technology.
- Digital media: short forms (lol, brb), emojis and voice notes spread fast and make writing closer to speech.
- Youth language: teens invent words to signal belonging; some fade, some stay.
Change is not "decay". It is how a language keeps up with its speakers.
Language families and world languages
There are about 7,000 languages. Related ones form a family, because they come from a shared ancestor. English, German, Spanish, Hindi and Bengali are all Indo-European. Compare "mother": Spanish madre, English mother, Hindi माँ: they come from one old root. Other families: Dravidian (Tamil, Telugu), Sino-Tibetan (Chinese), Afro-Asiatic (Arabic). Some languages like Basque belong to no known family.
Your own linguistic biography: list every language you hear at home, at school and online, and when you use each. That is your language map. A school can have ten languages in one room; that is diversity, not a problem.
Contrasting languages: word order, spoken and written
Word order. English and Spanish usually say subject-verb-object (SVO): "I eat rice". Hindi and Japanese say subject-object-verb (SOV): "मैं चावल खाता हूँ". Both are equally normal. Comparing two languages you know is the quickest way to notice your own grammar.
Spoken vs written. Speech is quick and live: short sentences, fillers ("umm"), repetition, gestures and tone help. Writing is planned and edited: longer sentences, careful words, no face to help. Some words fit one mode only ("gonna" in speech, "furthermore" in an essay).
Acquisition, multilingualism and sign languages
Acquisition. Babies babble at about 6 months, say first words around 12 months and join two words around 2 years. They learn by listening to people and by being spoken to, not from rules. Children can grow up with two or three languages at once.
Multilingual countries. India has many languages; Spain has Spanish plus others such as Catalan, Galician and Basque in their regions. People often switch between languages depending on the person and situation.
Sign languages (such as Indian Sign Language) are full languages with their own grammar, made with hands, face and body. They are not a gesture version of speech.
Try it: a practical
In the 3D: slide the time bar to see mater become madre. In the order picker, try English, Hindi, Japanese. Which languages have the verb last?
At home: ask a grandparent for 10 words they use that you do not. Write them in two columns (their word, your word). Which are from another language? Then say one sentence in two registers: to a friend and to a headteacher.
Key formulas and definitions
- Layers: sounds, words, sentences, meaning, use
- Varieties: dialect (place), sociolect (group), register (situation)
- Language family = languages from one shared ancestor
- Word order: SVO (English, Spanish) / SOV (Hindi, Japanese)
- Acquisition: babble ~6 months, first words ~12 months, two words ~2 years
Worked examples
1. Which layer of language studies the order of words in a sentence?
Syntax. It studies how words are put together into sentences.
2. A person says "gotta go" to a friend but "I must leave now" to a principal. What is this?
Register: the style changes with the situation.
3. Spanish "madre", English "mother" and Hindi "माँ" are similar. What does this show?
They come from a shared old root, so these languages are in one family (Indo-European).
4. Put these in SOV order: "I / eat / rice".
I rice eat (Hindi: मैं चावल खाता हूँ).
5. Is a dialect a "wrong" language?
No. A dialect is a variety with rules of its own. "Standard" just means chosen for schools and news.
6. Why do linguists say sign languages are real languages?
They have their own grammar and vocabulary, can say anything, and children acquire them naturally.
Common mistakes
- Thinking a standard variety is "correct" and dialects are "wrong".
- Thinking language change is always decay.
- Calling sign language a copy of speech. It has its own grammar.
- Confusing spoken and written style in formal writing.