Everyone makes typos and the predictions feature is incredibly useful to fix them, just like you can do on smartphones. Also, it can save your time by predicting words as long as you have typed a few letters. The Text Prediction feature comes in handy for people who happen to be poor spellers and/or poor typists (for instance, myself). If you’re using the touch keyboard in any of the following languages, you’ll now see words suggested as you type: Assamese, Bashkir, Belarusian, Greenlandic, Hawaiian, Icelandic, Igbo, Irish, Kyrgyz, Luxembourgish, Maltese, Maori, Mongolian, Nepali, Pashto, Sakha, Tajik, Tatar, Tswana, Turkmen, Urdu, Uyghur, Welsh, Xhosa, Yoruba, Zulu. It is using the first 3 installed languages from Language Settings for predictions. Starting with Windows 10 build 17093, the operating system supports up to 3 Latin script languages for multi-lingual text predictions.
The developers are hoping that this feature can reduce that barrier and allow you to easily type in multiple languages.
The additional step of manually switching between languages creates a barrier for users that are multi-lingual.