mother tongue: the first language that you learn as a child
learning strategies: techniques and plans that people use to help them learn
foreign: from a country that is not your own
native speakers: people who learnt a language as their first
slang: very informal language that uses new or rude words
jargon: words/phrases used by people in the same professsion
fluency:the ability to speak a language well without hesitation
accuracy: the quality of being correct
skill: an ability that needs to be learnt and practised
bilingual: the ability to speak two languages fluently