All pre-made voices and generated voices are English. This means that they might not have the correct accent or pronunciation when speaking other languages.
In the voice library, under the professional category, you can find voices that the community has shared with us. These voices are their own Professional Voice Clones of their voices. These voices generally have a language tag that indicates the language in which they were cloned, making them native to that language. You can also use the language search filter to filter for specific languages.