Please specify version of Desktop Editors that you are using, type of OS you are using and how did you install the app.
In general, the easiest way is by selecting needed Interface Language:
Also, there is a way to change it manually in the document template. You will need to locate those templates in installation folder of Desktop Editors, then back them up for safety and then change all parameters you need. General process is described here but with another product:
As for the paths, you can find some of them here:
That said, I’d ask to provide initial information for better understanding of your set up and then, in case Interface Settings do not work for you, I will provide more precise recommendations.
