It's not a secret that Cyberpunk 2077 features tons of languages in Night City. What is new information is that in order to understand languages, you'll need to upgrade your special translator with augments.
CD Projekt RED recently conducted a community meeting in Warsaw, Poland, where members of the public got the opportunity to ask the developers any questions they had. While CD Projekt were mum on some topics (car customization, for example), they did reveal details about the way languages work in Cyberpunk 2077.
Earlier this year, we reported that the wealthier sections of Night City would be made up of predominantly Japanese citizens. It turns out that Japanese, along with Spanish, is one of the more common languages in Night City, according to Reddit user u/Shavod in the Cyberpunk 2077 subreddit.
The user reports from the Q and A that since Japanese and Spanish are fairly common in Night City, you'll be able to understand them right from the start of Cyberpunk 2077. But to understand additional languages like Creole for example, you'll need to upgrade your personal translator with new augments.
CD Projekt didn't detail how you'd acquire these new augments for your translator. It reminds me of the translation system in Metal Gear Solid 5, where you'd need to recruit a soldier of a certain nationality to your army, in order to translate their native language when you're out in the field, like Russian or Afrikaans.