[A second language or L2 is any language learned after one's first language.](http://en.wikipedia.org/wiki/Second_language http://en.wikipedia.org/wiki/Second_l

[A second language or L2 is any language learned after one's first language.](http://en.wikipedia.org/wiki/Second_language http://en.wikipedia.org/wiki/Second_language) Otherwise you introduce ambiguity, if I learned 50 words in Spanish and then mastered French, does that mean French is my third language?