Issues with Korean text input and font handling in PrusaSlicer, causing infinite popups and font corruption.

[mnstn]

Description of the bug

When adding a text instance, every time I want to write in Korean, I have to follow these steps:

1. Select an English font.
2. Write the Korean sentence in a text editor (e.g., Notepad) and copy it.
3. Paste it into PrusaSlicer. The text appears as garbled characters like "????".
4. Then, select a Korean font.

This process is cumbersome because I have to keep switching font settings back and forth between English and Korean fonts, but at least it was usable.

However, after step 3, when I tried to change the text size by deleting the number, an infinite popup appeared repeatedly. It seems the popup keeps showing infinitely when the text size is set to 0. After this, I forcibly closed PrusaSlicer and reopened it, but now even the Korean fonts that were previously selectable are all garbled and can no longer be selected.

Is Korean officially unsupported? Even if the text shows as "???", could you please fix it so that I can change the font or other properties without triggering warning popups? It would be great if this process could be improved to avoid this infinite popup issue.

Project file & How to reproduce

I am attaching a reproduction video showing the situation after the forced closure. Please check it.

2025-06-18 193634.Zip

1. Add a text instance.
2. Paste Korean text while an English font is selected.
3. Observe garbled characters appear.
4. Switch to a Korean font.
5. Attempt to clear or change the text size number.
6. Observe infinite warning popups.
7. Restart PrusaSlicer and note corrupted font names and unselectable Korean fonts.

koreanfont.Zip

Checklist of files included above

• Project file
• Screenshot

Version of PrusaSlicer

2.9.2

Operating system

Window 11 pro

Printer model

prusa mk4

[u89djt]

(Fellow user taking an interest) I haven't looked at the font file you provided, but a default works fine, which maybe suggests a problem with your font?
testingtShape-Box.zip

[Snuff1eupagus]

Stop listening to this user, they know fuck all, and pretend to understand whats needed. move forward from this pretender. you would have better luck on the Prusa forums. the helpfulness is false. this person has no clue, they just pretend to or even believe they understand but don't. it's sad and they continue.

[kubispe1]

I am stepping into this conversation to address the nature of a recent comment. @Snuff1eupagus, your remarks towards other users are inappropriate and counterproductive to the collaborative spirit of this forum. This is not the first time (I will not list out the replies but.. )

We encourage all user contributions, whether they are tests, different perspectives, or further questions TO THE ISSUE. I want to highlight that this input is incredibly valuable, not just to our team but to other users as well. This collaborative process is vital for clarifying issues, identifying the root causes of problems across different configurations, and refining feature requests. Given the high volume of traffic on our issue tracker, these community efforts are essential!

If you wish to contribute constructively, you are in the right place and welcome. However, behavior that makes environment toxic will not be tolerated.
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