https://style-guide.europa.eu/en/content/-/isg/topic?identifier=9.1.2-addresses-in-unilingual-documents
9.1.2. Addresses in unilingual documents - Interinstitutional Style Guide - Publications Office of...
For unilingual texts, different rules and recommendations apply for mail to countries that use the Roman alphabet, for non-EU countries that do not use the...
https://style-guide.europa.eu/en/content/-/isg/topic?identifier=7.2.2-listing-languages-in-text
7.2.2. Listing languages in text (unilingual texts) - Interinstitutional Style Guide - Publications...
In text, languages are always listed in alphabetical order in the language of publication, and therefor varies according to the linguistic version.