A: This usually happens if the font file is corrupted or you downloaded a version without proper Thai glyphs. Try re-downloading from another source. Also, ensure your software supports Thai script (e.g., set your system locale to Thai if needed).
Alternatively, drag and drop the file into the folder located at C:\Windows\Fonts . For macOS: Double-click the font file in the Finder. Cpf Imm Sook Font Download
However, if you intend to use the font for: A: This usually happens if the font file