isiZulu (Zulu) is one of the 11 official languages of South Africa. There are 10,677,305 (23.82 %) first language speakers [2001 census data], which makes this the language in South Africa with the most first language speakers. isiZulu is mostly spoken in and around Kwa-Zulu Natal (see map). There are also a fairly large number of speakers in the Gauteng area.

isiZulu is a member of the "Nguni" language group, and is most closely related to isiXhosa, isiNdebele and SiSwati.

isiZulu words that have made their way into English

Mamba (a type of snake); Indaba (issue, matter, topic)

If you are learning Zulu, you might find this noun class reference chart handy (note: this is for reference/study purposes, it assumes you have already studied the grammar).

isiZulu (Zulu) language family tree.

A map showing the (very) approximate geographical area of South Africa where isiZulu (Zulu) is spoken (indicated in blue). There are also a number of speakers in Gauteng.

English	isiZulu
Hello	Sawubona
Hello (To more than one person)	Sanibonani (pronounced, roughly, "San'bonaan")
How are you?	Unjani?
I am fine	Ngikhona
Goodbye ("Stay well" - to one person, if he/she remains behind)	Sala kahle (Or: Usale kahle)
Goodbye ("Go well" - to one person, if he/she is leaving)	Hamba kahle (Or: Uhambe kahle)
Goodbye ("Stay well" - to multiple people, if they remain behind)	Salani kahle (Or: Nisale kahle)
Goodbye ("Go well" - to multiple people, if they are leaving)	Hambani kahle (Or: Nihambe kahle)
Thank you	Ngiyabonga
Yes	Yebo
No	Cha

Online dictionaries / Electronic dictionaries

Zulu - English / English - Zulu Dictionary Online bilingual isiZulu - English dictionary.

Jason Wolfe's Useful Zulu Medical Dictionary "Important Zulu Medical Words - Their Pronunciation and Translation."

Books

English-Zulu, Zulu-English (CM Doke, D McK Malcolm, JMA Sikakana, BW Vilakazi).
("The most comprehensive English-Zulu/Zulu-English dictionary available. Complete with notes on the new orthography, it is an invaluable reference for students of Zulu, Zulu speaking students of English and linguists working in the Zulu language")
[ Buy from Kalahari.net ]

Scholars Zulu dictionary: English-Zulu/Zulu-English (GR Dent, CLS Nyembezi)
[ Buy from Kalahari.net ]

South African Oxford Multilingual Primary Dictionary (Nguni) (OUPSA)
[ Buy from Kalahari.net | Publisher link ]

Learning Zulu

• 
  Handbook of isiZulu (P.C. Taljaard, S.E. Bosch) Zulu grammar reference
  [ Buy from Kalahari.net ]
• Say it in Zulu (A Wilkes)
  [ Buy from Kalahari.net ]
• Se jou se in zulu (A Wilkes) Afrikaans version of 'Say it in Zulu'
  [ Buy from Kalahari.net ]
• 
  A Linguistic Analysis of Zulu (G Poulos, CT Msimang) Zulu grammar reference.
  [ Buy from Kalahari.net | Author page ]

• Web-lingo South African based online translation service offering general and technical translations, development of multilingual websites, and software localisation services.
• Folio Translation Consultants "specialising in African, major European and Asian languages".
• Jako Olivier Language Services "For fast, reliable and quality translations between English and: Afrikaans, Ndebele, Northern Sotho (Sepedi), Otjiherero, Sesotho, Shona, Swahili, Swati, Tsonga, Tswana, Venda, Xhosa and Zulu."
• Asterisks.com Editing and Translation Services Online. Specializing in the 11 official languages of South Africa.
• Lingua Consultants specialize in the medical, pharmaceutical and chemical fields in European and African languages.
• Multilingua Translation and Interpretation Services

• Ukhozi FM

Online newspapers

Isolezwe (Zulu news)
A Zulu language South African newspaper, now online

Ilanga (Zulu news)
A Zulu language South African newspaper (since 1903), now online

Language courses

African Voices
produces multimedia CD-ROM lessons for isiXhosa and isiZulu. These can be ordered directly from African Voices in South Africa, or can also be purchased from Amazon:
Speak Zulu With Us (Book & CD-Rom...)

Miscellaneous websites

Zulu learner's reference guide by Matt Williams

http://www.geocities.com/CapeCanaveral/6570/
Ipheji labakhuluma isiZulu. isiZulu website, with discussion board.

eLanguage isiZulu site
Multimedia (images, sounds) isiZulu learning site.

Projects

Zulu Language Interface Pack for Windows XP
A partial isiZulu translation of Windows XP.

http://www.translate.org.za/
A non-profit organization translating various OpenSource software packages such as OpenOffice.org and the Mozilla web browser into all official South African languages. They have released isiZulu, Sesotho sa Leboa and Afrikaans versions of OpenOffice.

Wikipedia yesiZulu

Miscellaneous

Google in isiZulu