The pack covers 129 of the game's 143 languages. If you play in one of the languages without custom letters, the pack falls back to the default Unifont. This is intended behavior, not a broken install.
Check whether your language is covered
1. Open Options > Language and note which language is selected.
2. Temporarily switch to English and click Done.
3. Look at the menus and open a book. If the stylized letters appear in English but not in your usual language, that language uses the Unifont fallback.
4. Switch back to your preferred language. Menus and chat will still be fully readable, just in the fallback font.
Rule out other causes
If even English shows the vanilla font, the problem is your setup rather than your language. Try these checks:
- Pack not selected: In Options > Resource Packs, confirm the pack is in the Selected list and not Available.
- Another font pack above it: Any pack higher in the list that changes fonts will override this one. Move the Ugly Font pack above it.
- Force Unicode Font: On the Language screen, turn off Force Unicode Font. Leaving it on can make the game use Unifont instead of the pack's custom letters.
Mixed-language content
The screenshots show books combining English with Russian, and Greek with Ukrainian, all in the custom font. Covered scripts can share a page. A character from an uncovered script will appear in Unifont next to the stylized letters.