he did an interview in Portuguese though
but yeah he’s probably not super fluent but clearly has an aptitude for learning languages
I have Portuguese mates I haven’t learned shit
Agreed. You only need few hundred words in a language to do basic interview. Far from fluent. Many foreign players do interviews in broken English. Yes they can speak English but very little.
He's likely only fluent in his native Congolese language, French, Flemish and English. Italian he probably knows in a conversational manner. The rest is likely to be basic. To know a language fluently, you need practice and exposure. Otherwise, it can get rusty quite fast.
The reason I say this is because I know many multi-lingual people. I'm also multi-lingual, fluent in my parent's native languages (Hindi and Gujarati), English. But I can speak conversationally in broken Spanish. I can speak very broken Russian and German too. This doesn't mean I know 6 languages. Whenever, I'm Spain longer than a week, my Spanish naturally improves quite fast, but right now I'm in broken Spanish mode.
What Lukaku does have is a foundation to build on them, which is still impressive. If he moved to Sporting Lisbon, he would quickly be able to pick up the foundations.
Also, another thing to bear in mind is that because he knew French, it was likely easier for him quickly pick up other Latin group languages like Italian, Spanish and Portuguese.