I want that the name pointed, appears in Spanish.
Not possible.
(Though there are some limited exceptions).
To appear in multiple languages the title would have to be listed in the stringtable. When previewing the list of missions, the stringtables are not loaded by the game (only once you click Play). Hence, mission names cannot be in different languages.
The only exception is for words in the global stringtable ( <OFP>\Res\Bin\Stringtable.csv ), for example:
And the correct way to call it would be to use @ (rather than $), eg. @STR_AUTHOR_30