?- isub('E56.Language', 'languange', true, D).
D = 0.711348.
If Normalize is true, isub/4 applies string normalization as
implemented by the original authors: Text1 and Text2 are mapped
to lowercase and the characters "._ " are removed. Lowercase
mapping is done with the C-library function towlower(). In
general, the required normalization is domain dependent and is
better left to the caller. See e.g., unaccent_atom/2.
| Text1 | - and Text2 are either an atom, string or a list of characters or character codes. |
| Similarity | - is a float in the range [0.0..1.0], where 1.0 means most similar |