No localization for strings variables?

¿Is possible to gather text from strings variables with localization dashboard?

I’m using a Structure with some string variables and a data table for this structure.
Also using Localization dashboard to translate the game, but it don’t gather the text of strings variables.

No, there is no localization for String variables.

Localization only works with Text variable.
Text variable should always be used when you are showing textually something to the player.