Fix language codes with preprocessing

geolexica / isotc211.geolexica.org

ISO/TC 211 online version of the Multi-Lingual Glossary of Terms

https://isotc211.geolexica.org

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Closed skalee closed 4 years ago

skalee commented 4 years ago

Fix language codes which mismatch ISO 639-2.

This is a re-application of #137 in context of clean-ups on master branch (#139).