Change the language of the FF's built-in error messages from English to other languages

My project's primary language is Chinese, and I'd like to display all the texts in the app in Chinese.

However, FF's built-in error messages still remain in English. For example, the current message at the bottom of the screenshot: "Error: The email is already in use by a different account" is still in English.

Is there a way to change that (and other FF's built-in error messages that I haven't found) to other languages (including Chinese)?

Thanks in advance!