Currently there is a team collaborating to translate OptiKey into a number of different languages. We are discussing progress here: OptiKey/OptiKey#73
And translations are being performed on this website: https://www.transifex.com/optikey/optikey/dashboard/
We will be translating to latin based languages first, such as french, as these are easier, but there are already requests to look at non-latin languages like Russian, Arabic, Hebew, and Chinese.
I am just letting you know so effort is not duplicated.