That flag is used to suggest the correct forms for those misspelled words whose incorrect spelling was caused by forgetting diacritical marks (e.g. 'a' instead 'ä'), using umlaut meanings ('ue' instead 'ü') or for phonetic reasons ('f' instead 'ph'). Typical examples are:
TX Spell .NET for WPF 10.0 allows the specification of display names of dictionaries and synonym lists that are used to display them in the built-in dialog boxes instead of the actual name. This helps to display user-friendly dictionary names in the dialog boxes.
All compiled dependencies are bundled into packages that contain all DLLs together with other content needed in the projects that consume TX Spell .NET for WPF components.
After TX Spell .NET for WPF 10.0 has been installed using the developer kit setup, the new NuGet package source "Text Control Offline Packages" is added to NuGet and contains all available NuGet packages for Text Control components: