@pagefault: To import already translated resx you have to enter your language on crowdin. Then you click on PaintDotNet.Strings.3.resx And [File] -> [upload translations] select "Import suggestions that match the original phrase" and "Choose file" the rest is to translate missing strings.
Crowdin login: Skiff language: polish @pagefault: Crowdin supports uploading whole translation. There may be some differences for resx files, but shouldn't be big. More when I'll be able to check it out. Wainting for invite (can't find it on project search at crowdin).