Linguistics is the study of languages and covers all aspects of language, including phonetics (sounds humans make), phonology (the way sounds interact in a given language), semantics (meanings),...
Linguistics is the scientific study of languages and includes many theories to include other branches and disciplines of study such as psychology, sociology, anthropology,history,cognitive science...
Language goal, the goal of whatever (sorry don't have context) is based on language skills (grammar, pronunciation, vocabulary, etc.)
Linguistic - having to do with language or speech...
linguistic and non linguistic factors of English would be the same as verbal and non-verbal factors. verbal/linguistic: what you say and how you say it (words, tone of voice) non-verbal/non...