How do I stop these popup messages?

[ToasterxB]

I am using my Kobo to read books in my native language. Nowadays I keep getting this popup every time I open a book. None of the patches I tried seems to stop this. Any help would be appreciated

[Karellen]

Maybe you should do what it says and copy over a font file that contains the needed characters.

What language is that? Maybe you can find the font here... https://fonts.google.com/

[xyclonei]

Just to add to Karellen's post, have a go at Google's Noto font family as that is intended to cover all languages.

[Quoth]

Originally Posted by Karellen

Maybe you should do what it says and copy over a font file that contains the needed characters.

What language is that? Maybe you can find the font here... https://fonts.google.com/

Maybe Thai? Something Asian.
https://en.wikipedia.org/wiki/Thai_script

Doesn't look like Hindi or Korean.

[HLS]

The book may have characters that do not translate to your language is how i interpret it

[DNSB]

More that the book has glyphs that are not supported by the current font.

[Quoth]

Originally Posted by DNSB

More that the book has glyphs that are not supported by the current font.

Yes.
The UI language is is irrelevant as is the book language. It mostly works, so it's just a poor font for that language.

You can get a similar result with a Greek book if you use the wrong era of Greek font (diacritics?), or some Roman-Latin fonts that only have a subset of Greek letters, or not having the 3rd form of some letters that's used in the text.

In theory old or modern Irish could be using just the standard letters with áéíóú and ÁÉÍÓÚ, but sometimes some ejit might use the Turkish (and other Asian languages) dot-less i, ı, because in Irish that was always used for i to distinguish from í. Today doted consonants are written using the regular one followed by h, i.e. Bhí sé was originally Ḃí sé. Some fonts might not have dotted ḃ, ċ, ḋ, ḟ, ġ, ṁ, ṗ, ṡ, ṫ now written as bh, ch, dh, fh, gh, mh, ph, sh, th. Additionally even modern Irish uses Tironian et (⁊) instead of & and not all fonts have it. Old Irish might use a Gaelic type faceface (font) with old forms of letters using a different unicode so current forms are also included.

Gaelic typefaces also often include insular forms: ⟨ꞃ ꞅ⟩ of the letters ⟨r⟩ and ⟨s⟩, and some of the typefaces contain a number of ligatures used in earlier Gaelic typography and deriving from the manuscript tradition. Lower-case ⟨i⟩ is drawn without a dot (though it is not the Turkish dotless ⟨ı⟩), and the letters ⟨d f g t⟩ have insular shapes ⟨ꝺ ꝼ ᵹ ꞇ⟩.

Such documents may display [] or pop-ups if the wrong font is used, which will work for most of the text.

So it's the wrong font is being used.

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[Cootey]

Originally Posted by ToasterxB

I am using my Kobo to read books in my native language. Nowadays I keep getting this popup every time I open a book. None of the patches I tried seems to stop this. Any help would be appreciated

You didn’t mention what happens when you tap on “Ignore”.

[ToasterxB]

This Language is called Malayalam from South Indian. I use Meera font. Tried Noto Sans font and it doesn't work properly. Meera font works no problem and I have been using this font for a few years now. And only recently after last few software updates I'm getting this annoying popup when I open books.
I can continue reading the book when I tap " ignore". But I'd like to be able to stop these popups once and for all.

[Quoth]

Are you embedding the Meera font in the epub, or just copied to to the fonts folder on the Kobo?