MOTHER TONGUE DAY

Every 21st of February we celebrate "Mother Tongue Day". We who are learning foreign languages must not forget the first tongue our parents (usually) taught us when we were young.
Our mother tongue is something we learnt without any effort, by playing, by listening, by repeating...
For more information on this click Wikipedia, Facebook or Unesco.

Here is a presentation describing the process involved in the learning of a language.

Lenguaje Humano from José Antonio Alcalde López