That's right – but many scientists also believe that knowledge of another language can boost your brainpower. A study of monolingual and bilingual speakers suggests speaking two languages can help slow down the brain's decline with age.
Well this depends on your mother tongue. In general, the closer the second language is to the learner's native tongue and culture in terms of vocabulary, sounds or sentence structure - the easier it will be to learn.
the ability to think.
the first language that somebody learns to speak.