Yes, this tool properly supports Unicode characters.  I also tested a huge VCF file with a variety of language contacts, including Hindi, English, and Chinese.  After splitting, this WholeClear Split vCard Software can keep the original formatting intact.  This professional tool separates vCard files while retaining all of the details.  This vCard splitter freeware works completely offline and supports all VCF file formats.  This tool is compatible with all versions of Windows, including Windows 11, Vista, and 98.  The tool provides a free demo to test its capabilities, so try it today before purchasing.