Optional parameters may include information such as character set encoding or language.

可选参数可能包含诸如字符集编码或语言等信息。

youdao

The names of locales usually consist of ISO 639-1 language, ISO 3166-1 country codes and optional encoding names and other qualifiers.

语言环境的名称通常由iso 639 - 1语言、ISO 3166 - 1国家或地区代码以及可选的编码名称和其它限定符组成。

youdao

Since the default UCA cannot cover the collating sequence of every language supported by Unicode at the same time, the ordering of characters can be customized using optional attributes.

因为默认的UCA不能同时覆盖unicode支持的每种语言的排序规则序列，所以可以使用可选属性定制字符的次序。

youdao

Ostensibly due to budget cuts, the previous year the Board of Regents voted to discontinue the last of the optional state language exams.

FORBES: Are New York City Students Getting Smarter Or Are Regents Exams Getting Easier?

Yet there is also talk of introducing optional Kurdish-language classes in government schools.

ECONOMIST: Turkey and the Kurds