Fix Spanish translation

[segfaultxavi]

Lots of words are wrong to the point of being ridiculous and unprofessional. I would even remove the possibility of selecting Spanish as a language until this is fixed.

If you add the Documentation label to this issue (or assign it to me) I will keep track of it.

[AnthonyLaw]

That is awesome, you can help to update the language for Spanish.

here is Wiki for explorer.

https://github.com/nemgrouplimited/symbol-explorer/wiki/Add-translation