On an English keyboard on the iPad, the most important punctuation (period, comma, question mark, exclamation mark) are readily available and convenient to use. On other keyboards, unfortunately, this isn't the case. Russian keyboard, for example, lacks any punctuation in the default mode. This means one has to tap the .?123 button very often, and this is especially annoying in the case of commas (the tap-spacebar-twice-to-enter-period trick helps with the other often-needed punctuation).
There are different solutions to this that I've seen. iA Writers's extension is language-specific, and this is quite convenient to use. Other editors allow to customize the extended keyboard.
I've recently purchased Pythonista and Editorial, and I'm trying to adjust Editorial for my writing needs. I really loved the whole experience, and the automation blew my mind. But, unfortunately, as I write in Russian, the lack of comma on the keyboard is a real inconvenience.
Can you make the keyboard extension customizable? I'd happily sacrifice one of the buttons in exchange for a comma.
And while we're there: auto-paired customizable quotation marks (like «this» for Russian, or „this“ for German) would be absolutely great as well.