fpsync: add Spanish translation

[kant]

• The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• The page(s) have at most 8 examples.
• The page description(s) have links to documentation or a homepage.
• The page(s) follow the content guidelines.
• The PR title conforms to the recommended templates.
• Version of the command being documented (if known):

[kbdharun]

Thanks for your contribution, command contents that aren't inside the placeholder shouldn't be translated or else it will be flagged by our checks. (Reverting it would fix the lint error)