Is learning a foreign language a question of learning new skills or a question of acquiring new knowledge?

学习外国语是学习一种新技能，还是获取新知识呢？

《新英汉大辞典》

Video is a good medium for learning a foreign language.

录像是一种学习外语的好方法。

《牛津词典》

A good dictionary is indispensable for learning a foreign language.

一本好词典是学习外语必备的。

《牛津词典》

Have you run into any difficulty while learning a foreign language?

学外语的时候你遇到过什么困难吗？

阳光总在风雨后 - SpeakingMax英语口语达人

In four of the schools covered, more than half the pupils at ages 14 to 16 had stopped learning a foreign language.

BBC: NEWS | UK | Education | Language teaching 'too boring'

Its steep learning curve is not something to shy away from -- much like learning a foreign language, once immersed in the game play, players will pick up the necessary skills along the way.

CNN: Technology - Open-source, networkable shooter has Linux gamers buzzing

Having donated to a foreign-language learning program at my sons' school, for example, I felt motivated to write letters of protest when it became threatened by the school board.

WSJ: How to Be More Charitable