An ambitious and interesting option for Europe could be Arabic as the lingua franca.

There’s Maltese, which is an official EU language, albeit probably not the most useful for interchange with the Arab world as a whole.

https://en.wikipedia.org/wiki/Maltese_language

Maltese (Maltese: Malti, also L-Ilsien Malti or Lingwa Maltija) is a Semitic language derived from late medieval Sicilian Arabic with Romance superstrata. The only official Semitic and Afroasiatic language of the European Union and the only Semitic language to use the Latin alphabet, and the only Afroasiatic language other than Somali to use a Latin script, it is spoken by the Maltese people and is the national language of Malta.

The original Arabic base comprises around one-third of the Maltese vocabulary, especially words that denote basic ideas and the function words, but about half of the vocabulary is derived from standard Italian and Sicilian; and English words make up between 6% and 20% of the vocabulary. A 2016 study shows that, in terms of basic everyday language, speakers of Maltese are able to understand less than a third of what is said to them in Tunisian Arabic and Libyan Arabic, which are Maghrebi Arabic dialects related to Siculo-Arabic, whereas speakers of Tunisian Arabic and Libyan Arabic are able to understand about 40% of what is said to them in Maltese. This reported level of asymmetric intelligibility is considerably lower than the mutual intelligibility found between mainstream varieties of Arabic.

Maltese has always been written in the Latin script, the earliest surviving example dating from the late Middle Ages. It is the only standardised Semitic language written exclusively in the Latin script.