If you are beginning in Word, apply the Spanish style to your Spanish text. Whether you are using Swift or have attached the BANA template to your document via a macro, the Spanish style is represented by the red capital S on the Braille or Add-ins ribbon. You can also use keyboard shortcut Alt+Shift+S to apply it to the highlighted text.
Text within this style will be uncontracted and use Spanish braille symbols for the modified letters (punctuation, however, will remain in UEB) when the Word document is opened in Duxbury. If you accidentally insert the style on your English text, then it will be uncontracted, so make sure you are just applying the Spanish style to your Spanish text and the English portion should remain contracted. Hope this helps!