This isn’t an ANVL issue — it's caused by browser font/print settings.
Good news: it’s easy to fix.
Why It Happens
Browsers sometimes substitute fonts or block embedded fonts when generating PDFs.
Result: characters print as boxes, question marks, or blank space.
To fix it, users simply need to enable “Background graphics”, “Print with system dialog”, or ensure the browser uses a unicode-friendly font when printing.
Quick Fix Steps by Browser
Google Chrome
Open the ANVL workflow.
Click Print (or export to PDF → Print).
In the print preview panel, open More settings.
Turn on Background graphics.
Ensure PDF is selected as the destination.
Print/Save again.
Microsoft Edge
Click Print.
Open More settings.
Enable Background graphics.
Save/Print again.
Firefox
Click File → Print.
Select Print Using System Dialog (bottom-left).
Choose Save as PDF.
System dialog fonts usually fix special-character issues.
Additional Recommendations
If characters still fail, you may need to install a unicode font (e.g., Noto Sans CJK).
Download the Noto Sans CJK family from GitHub: notofonts/noto-cjk GitHub
Google’s Noto font collection: Noto Fonts on Google Fonts Google Fonts+1
Noto usage guide (which outlines script variants such as Simplified Chinese, Traditional Chinese, Japanese, Korean): https://notofonts.github.io/noto-docs/website/use/
Avoid browser extensions that modify print previews.