Is it possible to mix different fonts for different alphabets?

My use case is as such: my web application is only available in English and we are using the font Nunito. Some people write within the app with characters from other alphabets, but it works, I guess because the browser automatically changes the font. So for example if I write this, it works: γεια σας สวัสดี 你好 Helló ሰላም صباح الخير

But you can make a PDF export from my app, and I had to declare the font for the export, so of course now the characters not included in Nunito are replaced with blank rectangles.

I want the PDF export to display all the characters, and I know the font Noto is available in a lot of languages with different alphabets, but the thing is, as I said, our app is only available in English, so I cannot use a specific font depending on the selected language, and even if it was possible, that wouldn't fix the problem when mixing different alphabets.

So my question is: is there a single font that includes "a lot of" alphabets; or is there a way to load different fonts (such as all the Noto variants) and add a mechanism that chooses the best one for every character (something like a fallback from font to font, like I guess the browsers do)?