second language (n)
/ˈsɛkənd ˈlæŋɡwɪdʒ/

a language that someone learns to speak well and that they use for work or at school, but that is not the language they learned first

bilingual (a)
/ˌbaɪˈlɪŋɡwəl/

using two languages; written in two languages

mother tongue (n)
/ˈmʌðər tʌŋ/

the main language that you learn as a child

native speaker (n)
/ˈneɪt̮ɪv ˈspikər/

a person who speaks a language as their first language and has not learned it as a foreign language

accent (n)
/ˈæksɛnt/

a way of pronouncing the words of a language that shows which country, area, or social class a person comes from

pronounce (v)
/prəˈnaʊns/

to make the sound of a word or letter in a particular way

spell (v)
/spel/

to form a word or words with the letters in the correct order

plural (n)
/ˈplʊrəl/

a form of a noun or verb that refers to more than one person or thing

progress (n)
 /ˈprəʊ.ɡres/

a movement forward

grammar (n)
/ˈɡræm.ər/

the set of rules that describe the structure of a language and control the way that sentences are formed

language (n)
/ˈlæŋɡwɪdʒ/

the method of human communication using spoken or written words

conversation (n)
 /ˌkɒn.vəˈseɪ.ʃən/ 

a talk between two or more people, usually a private and informal one

countable noun (n)
/ˈkɑʊn·tə·bəl ˌnɑʊn/

a noun that can be counted because there can be one or more of it

uncountable noun (n)
/ʌnˈkɑʊn·tə·bəl naʊn/

a nouncannot be counted

verb (n)
/vərb/

a word or group of words that expresses an action (such as eat), an event (such as happen), or a state (such as exist)

adjective (n)
/ˈædʒɪktɪv/

a word that describes a person or thing

adverb (n)
/ˈædvərb/

a word that adds more information about place, time, manner, cause, or degree to a verb, an adjective, a phrase, or another adverb

pronoun (n)
/ˈproʊnaʊn/

a word that is used instead of a noun or noun phrase, for example he, it, hers, me, them, etc.

preposition (n)
/ˌprɛpəˈzɪʃn/

a word or group of words, such as in, from, to, out of, and on behalf of, used before a noun or pronoun to show place, position, time, or method

idiom (n)
/ˈɪdiəm/

a group of words whose meaning is different from the meanings of the individual words