Fix #8139 : add iso-639-1 code for language as oai_dc specification #8689
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What this PR does / why we need it:
add iso-639-1 code for language in citation metadatablock
Which issue(s) this PR closes:
Special notes for your reviewer:
Suggestions on how to test this:
Does this PR introduce a user interface change? If mockups are available, please link/include them here:
Is there a release notes update needed for this change?:
Yes, reload citation.tsv file
Additional documentation: