The orthography is the written system and spelling of a language.

VOA: special.2011.04.13

He published a treatise that he had written earlier on grammar, inventing his own system for the understanding and the learning of the Latin language.

发表了一篇他之前写的关于语法的论文，在这篇论文中他创建了自己的一套理解和学习,拉丁文的体系。

耶鲁公开课 - 弥尔顿课程节选

You could use language to describe music, talk about the--a musical language or art, or any communicative system, and there's actually nothing wrong with that.

也可用来描述音乐,即音乐语言,或是去描述艺术,或任何的交流系统,都是没问题的

耶鲁公开课 - 心理学导论课程节选

But with threats, a language barrier and fear of the legal system, victims often do not or are unable to seek help.

VOA: standard.2010.05.24

They take this makeshift communication system developed by adults and, again, they turn it into a full-blown language, suggesting that to some extent it's part of our human nature to create languages.

他们继承了成人发展出来的临时交流系统,将这个临时交流系统,再次发展成一种成熟的语言,这表明从某种程度上来说,创造语言是我们人类本性的一部分

耶鲁公开课 - 心理学导论课程节选

It has over 700 different language groups, no national transport system to speak of and few government services that actually operate outside of the capital, Port Moresby.

VOA: standard.2009.04.04