how do i know if english is my first language
First language A first language, native language or mother/father tongue (also known as arterial language or L1) is a language that a person has been exposed to from birth[1] or within the critical period. In some countries, the term native language or mother tongue refers to the language of one's ethnic group rather than one's first language.[2] Children brought up speaking more than one language can have more than one native language, and be bilingual or multilingual. By contrast, a second language is any language that one speaks other than one's first language.