There is a list of translation

You can use translation

	Language	Title	Site	Administrator
	ar-AA	Arabic (Unitag)	In Progress	In Progress
	cs-CZ	Czech (Czech Republic)	Yes	Yes
	da-DK	Danish (Denmark)	Yes	No
	de-DE	German (Germany)	Yes	Yes
	en-GB	English (United Kingdom)	Yes	Yes
	es-ES	Spanish (Spain)	Yes	Yes
	fr-FR	French (France)	Yes	Yes
	el-GR	Greek (Greece)	Yes	Yes
	it-IT	Italian (Italy)	Yes	Yes
	nl-NL	Dutch (Netherlands)	Yes	Yes
	pl-PL	Polish (Poland)	Yes	Yes
	pt-PT	Portuguese (Portugal)	Yes	Yes
	ru-RU	Russian (Russia)	Yes	Yes
	uk-UA	Ukrainian (Ukraine)	Yes	Yes
	vi-VN	Vietnamese (Viet Nam)	No	No
	zh-CN	Chinese (China)	No	No

Yes - Translation is exist and included in component/module/plugin
No - Translation doesn't exists, and there is no work on it
In Progress - There is work on translation, the author confirmed work