A first language is what you learn first. 
A first language is what you hear from birth.
Some people grow up with two first languages. These people are called bilingual. They can use both ways of talking very well.
Learning a new language can take a long time. It may take many years to speak like a native. 
A first language is the first way you learn to speak.
Some people grow up with more than one first language. They might be bilingual, which means they speak two languages well. They can also be multilingual if they speak many languages. 
Being a native speaker means you learned a language as a young child. Native speakers have a natural feel for the rules of speech. They do not always know every rule, but they have good intuition. This means they just know how words should sound. It can take five to seven years to speak like a native speaker. UNESCO named February 21 as International Mother Language Day to honor these languages.
A first language is the very first way a person learns to speak. People often call it a mother tongue or a native language. This language is a huge part of who a person is. It helps a child learn how to act and talk in their community. It also connects them to their own culture and social group.
Becoming a native speaker happens through a special way of learning. A child learns by listening to adults in their own family. This process is called natural acquisition. Native speakers often have a special feeling for their language. They might not know every single grammar rule by name. Instead, they have a strong intuition about how words should sound. 
There is a long history behind these words. A thinker named Ivan Illich said the term "mother tongue" came from Catholic monks. They used it to describe the language they spoke to people. They spoke this language instead of Latin when they were at the pulpit. This term was later passed down through history.
Many different rules help experts define a native speaker. One rule is that the person learned the language in early childhood. They must also use the language and speak it fluently. Experts look for people who can speak easily in many social settings. They also look for people who do not have a foreign accent. 
Sometimes, a person can have more than one first language. These people are called bilingual if they speak two languages well. If they speak many languages, they are called multilingual. 
A first language, also called a native language or mother tongue, is the very first language a person encounters from birth. It is often learned during a critical period of early development. This language is much more than just a way to communicate. It forms a core part of a person's social, personal, and cultural identity. Through this language, children begin to reflect and learn successful social patterns for acting and speaking.
Becoming a native speaker involves a specific process called natural acquisition. This happens through constant personal interaction with the language and its speakers. Unlike people who study a language later in life, native speakers acquire it instinctively. They may not be able to name every complex grammatical rule. However, they possess a strong linguistic intuition. This means they have a natural sense of when a sentence is correct or incorrect. 
Scholars use several different criteria to define what a native language actually is. Some define it based on origin, which is the first dialect or language a person establishes long-lasting verbal contact with. Others look at internal identification, or how a person feels connected to a language. External identification looks at how other people perceive a speaker's language. There are also definitions based on competence, which is how well one knows the language, or function, which is how often it is used. Finally, some use nationhood, referring to the dominant language used by the vast majority of people in a specific area.
There are many different ways the term "mother tongue" is applied globally. In some nations, such as Kenya, India, Belarus, and Ukraine, the term refers to an ethnic group's language rather than an individual's first language. In Singapore, it refers to an ethnic language regardless of how well the person speaks it. Statistics Canada uses a specific definition for its population censuses. They define mother tongue as the first language learned at home in childhood that the individual still understands. It is possible for a person to have learned a language at home but no longer use it as their primary way of speaking.
The history of these terms is quite complex. The thinker Ivan Illich suggested the term "mother tongue" originated with Catholic monks. They used it to describe the specific languages they used when speaking from the pulpit instead of Latin. This usage was later inherited by colonies through the influence of Christianity. In a different view, the author J.R.R. Tolkien made a distinction in 1955 between the "cradle tongue" and the "native tongue." He argued the cradle tongue is what one learns in early childhood. He believed a true native tongue might be discovered later through a strong emotional affinity to a specific dialect.
Language experts often use six principles to identify a native speaker. First, the individual must have acquired the language in early childhood and still use it. Second, they must have intuitive knowledge of the language. Third, they should be able to produce fluent and spontaneous discourse. Fourth, they must be communicatively competent in various social contexts. Fifth, they should identify with a specific language community. Finally, they typically do not have a foreign accent. 
Learning a new language is a very different process than acquiring a first one. Research indicates that while a non-native speaker might reach fluency after two years of immersion, they face a long road to true mastery. It can take between five and seven years for a child to reach the same working level as a native speaker. Some people are even bilingual, meaning they are equally proficient in two languages. A "balanced bilingual" is a child who is so fluent in two languages that neither feels like a single native tongue. These individuals often show great mental flexibility when shifting between languages.
To honor the importance of these foundational languages, UNESCO took action. On 17 November 1999, they designated 21 February as International Mother Language Day. This day recognizes the value of linguistic diversity and the importance of mother tongues to human identity. 
🖼️ Images & Media (2)
More to explore
✨ What else?
Related topics you might enjoy
🔬 Go deeper
More advanced topics to explore
🪜 Step back
Simpler topics to build understanding
What is Nepedia?
A free, ad-free encyclopedia for children. Every article is written at five reading levels, so the same page works for a five-year-old and a fifteen-year-old — use the level switcher above to see this one change. No account needed to read.