What is your first language before mother tongue?

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The mother tongue/dialect is the person's first language in his/her society, but it does not apply to some people because their parents taught them to speak the other language before the native language. Well if that's the case, what is your first language before your mother tongue/dialect? For me, i learned English at a very early age by my parents here in the Philippines before i learn Filipino or Tagalog, not to mention that i was mistaken that i was raised from US but in fact i wasn't.