Replied 8 September 2017, 1:11 pm EST
This may not be of much help but, you can put language text in the designer and get that information to show up. Here is a rough draft of the steps:
Set Localizable to true and set the language for the form.
Then bring up the Spread designer and set SerializeModels to true.
Then put your text in your headers, cells, etc... Apply the changes.
Set the form language to another language, bring up the designer (make sure serializemodels is true), put in the text, apply.
Repeat until you have text for each language. If you now change the language for the form (Language property), it should change to the resx data for that language.