While we do not have any Spanish speaking employees on staff we typically have no problem communicating by having text translated. It would be a lot to manage if we had to create variations of content for every popular language since we do support an international market but I'd be happy to assist you as best I can here.
The "Downscaling an image in Photoshop failed" message will typically occur if you do not have the correct version of Photoshop selected in the Designd Settings panel. Please double-check the version that you have selected is installed on your computer.
You can also try exporting/reviewing without this setting checked to ensure it is not content related. If it could be content related it's possible you have some invalid file types linked in your documents that Photoshop could not open, or if you have any .PSD, .PDF, .EPS or .AI files that might be causing Photoshop to attempt opening a call to action popup window and interrupting the export script.