Sanitize languages controlled vocabulary values

[stevenferey]

What this PR does / why we need it:

This is a first proposal open to proposals in order to fix the desired modifications before working on the flyway script.

Which issue(s) this PR closes:

Closes #8243

Special notes for your reviewer:

Provide your suggestions for modifications directly in the PR review

Additional documentation:

https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Languages/List_of_ISO_639-3_language_codes_(2019)

https://en.wikipedia.org/wiki/List_of_ISO_639-2_codes