Being able to type Chinese pinyin tone markings quickly is extremely useful for learning and instructional reasons. Most of the options available are problematic and/or inefficient. Is there an easy way to do this with Swiftkey's English or Mandarin keyboards? Could this be folded in as an option to existing keyboards, and/or could their be a specific language option for it?
Pinyin is the first character set learned by young Chinese children -- it's not just a crutch for expats and other gringos. There is a need and a demand for this sort of feature.