On Windows 7, Microsoft Anna (US female) is the default and only English voice. For those who are using Windows 8/8.1/10/11 computers, you will get Microsoft speech synthesis voices in English US, English UK, English India, German, French, Italian, Spanish, Portuguese, Russian, Polish, Japanese, Korean, Chinese and more, by installing the corresponding language packs. Or click here to search for how to install additional language packs.
Windows users can also install third party voices that are Microsoft SAPI 5 compliant.