Adjustments to lang tag files, including adding translator

[themerekat]

This PR includes some cleaning up of previously-created lang tag files, including consolidating some files. I've also added translator and translation date to the top of the Spanish files that Samanta translated.

Pull Request Checklist:

Pre-Approval

• There is a description section in the pull request that details what the proposed changes do. It can be very brief if need be, but it ought to exist.
• Features and backlog bugs should be merged into the Development branch, NOT master
• All new text is preferably internationalized (i.e., no end-user-visible text is hard-coded on the PHP pages)
• There are no linter errors
• Symbiota coding standards have been followed

Post-Approval

• It is the code author's responsibility to merge their own pull request after it has been approved
• If this PR represents a merge into the Development branch, remember to use the squash & merge option
• Don't forget to delete your feature branch upon merge. Ignore this step as required.

Thanks for contributing and keeping it clean!

[egbot]

Love that attribution is being applied