The keyman lexical model can not differ letters with different tones

Hello keyman team.
I amd trying to do a vietnamese Chu Nom keyboard
However, I found that the keyman lexical model can not differ letters with different tonations, and let the whole keyboard can not work.

the second issue is I don’t know how to set the word break. To be honest, in many languages, the space is not the word breaker, including in the English, the words often come out in pairs. We should add those comibination in to our model, too. However the current lexical model will detect and space as a word breaker.

The third issue is I can not set specific punctuations as a letter instead of a word breaker, for example I want to set ` as a page down mark, however the keyman model detect it as a word breaker.

The custom icon in fact there is nothing inside, I can not set anything inside.

Could you told me how to solve those issues?

Hi @Cathaylab

The lexical-model guide for advanced topics may help answer some of your questions
https://help.keyman.com/developer/current-version/guides/lexical-models/advanced/

I was going to give the same link – I think your all three of your questions are answered by the topics there (refer to the ‘search key’ topic for handling different tonations)