what i can say is that i know that some airlines wouldn't mind multilingual crew since it would be beneficial for the working environment, who would be able to have right of abode in the EU. example is SWISS International Airlines, and LH. Switzerland's national language is four as the name suggest Suisse, Schweiz, Svizzera,and svizra. French, Swiss German (different from austrian and deutschlands german.), Italian and Romanisch(Spoken by 2% of the swiss population). LX is getting its A332 replaced with A333 startin from next year.
I have close to 500 on the A320. am very very young, mid 20s maybe i may try for VS, so i can pilot their A340-300/600.I know they wouldn't mind a western nigerian like me

since nigerian standard would be too low for me

. So NIJASEA i suggest u to learn another language just to make your resume more interesting.
My dream would have been LH because of mixed fleet flying A330-300, A340-300/600. But because of niaja friends in the UK VS is an option .