Darkheart is an OpenType interlock font. In OpenType savvy applications, certain letter pairs are automatically substituted with custom letter pairs or autoligs.

Darkheart includes accents for: Albanian, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, English, Estonian, Finnish, French, German, Hungarian, Icelandic, Italian, Latvian, Lithuanian, Polish, Portuguese, Serbian, Slovak, Norwegian, Spanish, Swedish Turkish & Welsh.