HarfBuzz 2.4.0 Engine/Source/ThirdParty/HarfBuzz Provides text shaping support for complex languages (eg, Arabic) within Slate in UE4. https://github.com/harfbuzz/harfbuzz/blob/master/COPYING Licensees Git P4 //UE4/Main/Engine/Source/ThirdParty/Licenses/HarfBuzz_2-4-0_License.txt