Does Zoho Sheet support international charset (unicode)?

Does Zoho Sheet support international charset (unicode)?

I used Zoho Sheet and I was able to create a spreadsheet with unicode character. However, when I reloaded the file, or when I shared it with others, the text became un-readable.

Does Zoho Sheet support international charset (unicode)? If so, what I have to do so that when I share a document with others, the text does not become un-readable?

Thanks so much!
Sean