Hi Anastasia,
You may be facing the above issue due to the Region and language set in the system. To address this concern, we suggest setting the Country or region which supports the language you prefer. You will be allowed to download the language pack when you see Language pack available status under the selected language. Visit this link for further information about how to add and switch input and display language preferences in Windows 10. On the dropdown menu, make sure to select Set your display language.
Let us know if further assistance is needed.