I am a former SIL member currently living in the Tŝilhqot’in area and teaching linguistics and language learning to people in the area. I appreciate the availability online at your online site, but I have a suggestion for an additional feature.
In the language, there are no instances of double consonants at all; my suggestion would be to adapt the current keyboard in the following way:
ss becomes ŝ
zz becomes ẑ
ww becomes ŵ
and ii becomes ɨ
This would be easy to remember and also easy to type.
Thanks again for all you are doing for marginalized languages of the world.