Transliteration, or writing words in the corresponding letters of a different alphabet, is available for Simplified Chinese in the Translator apps for Android and iOS to help non-Chinese speakers read Chinese characters.
Although Simplified Chinese is used throughout mainland China as a writing system, the way these characters are pronounced may differ significantly in various regions of the nation. For instance, in the area around Guangzhou and Hong Kong the majority of the population speaks Cantonese whereas in the area around Beijing the majority of the population speaks Mandarin. Both regions use Simplified Chinese as a writing system.
The version of transliteration used in the Microsoft Translator apps is known as PinYin, which is based on Mandarin pronunciation of Simplified Chinese.