Wrong characters displayed in runtime with translations and Montserrat font

[brane-games]

Godot version

4.1.1

System information

Linux

Issue description

In runtime, the characters are different than in the editor.

I could only reproduce with Montserrat font, and when Settings/Locale/test is set to sr

Steps to reproduce

Can be reproduced in the small project I uploaded.

Minimal reproduction project

font_issue.zip

[akien-mga]

Serbian locale can typically be either Latin or Cyrillic. I think with our OS.get_locale() formatting this would be sr_Latn or sr_Cyrl (following https://en.wikipedia.org/wiki/ISO_15924). Not sure which one is used by default if you specify only sr, but your test seems to show that it would be sr_Latn, while your OS/editor locale might be sr_Cyrl?

CC @bruvzg

[brane-games]

When printing out OS.get_locale() I get en_US which makes sense because my OS is in english

[bruvzg]

These substitutes for Serbian are set in the font file itself, so Godot (it's done by HarfBuzz library in particular) is doing what font designer intended to be done:

Substitution list:

Target glyphs:

As a workaround, you can change language value (force it to en) in the Labels BiDi properties, it will affect rendering only and should not interfere with localization.

[bruvzg]

Also, I take a quick look at the Wikipedia, and this glyph style might be actually correct:

[brane-games]

Thank you! I think it can be closed now.