Alternatively, maybe it's related to a specific operating system or application that uses a font called CPF IMMSook. Let me check if there are any known fonts with those keywords. Searching online, I don't find any immediate results for "cpf imm sook font". Maybe the user made a typo. Could it be "CFP" instead of "CPF"? Or "CMF"? Sometimes in Thai names, there are similar sounds. Maybe "Im Sook" is a Thai name. If it's a Thai font, perhaps it's a specific typeface for Thai script. Maybe "IMM" is part of the font's name, like IMM Thai Font.