Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.
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Question: The Tuvaluan language is spoken by virtually everyone, while a language very similar to Gilbertese is spoken on Nui.

Answer: Almost everyone speaks Tuvaluan. However, a language very similar to Gilbertese is spoken in Nui.

Question: When South Africa became a republic in 1961, Pretoria remained its administrative capital.

Answer: Pretoria remained South Africa's capital after it became a republic in 1961.

Question: Honours Mitsuko Uchida was appointed Honorary Commander of the Order of the British Empire (CBE) in the 2001 New Year Honours.

Answer:
Honours: Mitsuko Uchida was named Honorary Commander of the Order of the British Empire (CBE) in the 2001 New Year Honours.