README: The library uses C++ features, so is a C++ library.

README.md

 - [Data Files](#data-files)
   - [Unicode Character Database](#unicode-character-database)
   - [ConScript Unicode Registry](#conscript-unicode-registry)
-- [C Library](#c-library)
+- [C++ Library](#c++-library)
   - [Querying Properties](#querying-properties)
   - [Case Conversion](#case-conversion)
   - [wctype Compatibility](#wctype-compatibility)
 
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-The Unicode Character Database (UCD) Tools is a set of Python tools and a C
+The Unicode Character Database (UCD) Tools is a set of Python tools and a C++
 library. The Python tools are designed to support extracting and processing
-data from the text-based UCD source files, while the C library is designed
-to provide easy access to this information.
+data from the text-based UCD source files, while the C++ library is designed
+to provide easy access to this information within a C++ program.
 
 ## Data Files
 
 This data is located in the `data/csur` directory in a form compatible with the
 Unicode Character Data files.
 
-## C Library
+## C++ Library
 
-The C library provides several different facilities that make use of the UCD
+The C++ library provides several different facilities that make use of the UCD
 data. It provides a compact and efficient representation of the different data
 tables.