There is a training that improves handwriting recognition overall in Windows. There are 50 sentences and you have to train for each language used. However, you can save and transfer these "training files" : Transfer handwriting personalization to another Tablet PC
Yoga member at Surface Forums explains how to find it in Windows 8+ by going to "the handwriting "training". It's in "control panel"/"Time, Language,Region"/"Add Language"/. Edit the Options of the installed language."