keeping in mind our mother tongue

       In our country , we have our own language or we call mother tongue . We  have different language here in our country , like ilocano , bisaya and etc. Ilocano is my mother tongue . Since birth this  is the languge that I use . I use it for communicating to my friends , family , and other people .  So what is  a mother tongue ?
      A first language (also native language, mother tongue, arterial language, or L1) is the language(s) a person has learned from birth or within the critical period, or that a person speaks the best and so is often the basis for sociolinguistic identity. In some countries, the terms native language or mother tongue refer to the language of one's ethnic group rather than one's first language. Sometimes, there can be more than one mother tongue, when the child's parents speak different languages. Those children are usually called bilingual.The origin of the term "mother tongue" harks back to the notion that linguistic skills of a child are honed by the mother and therefore the language spoken by the mother would be the primary language that the child would learn.