Spanish localization for 1.97.0 (#7564)

* Updates and missing translations.

Added some missing translations, corrected a few inconsistencies (paquete inicial; video) and edited to strings to use gender-neutral language.

* Update src/locale/locales/es/messages.po

Thanks @surfdude29 for pointing this out

Co-authored-by: surfdude29 <[email protected]>

* Update src/locale/locales/es/messages.po

Co-authored-by: surfdude29 <[email protected]>

* Update messages.po

* Update messages.po

* Update messages.po

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Co-authored-by: surfdude29 <[email protected]>