Thanks to Microsoft's HoloLens you would no longer require to be fluent in any language. The company has demonstrated that it is not only possible to create a very life-size hologram but also make the said hologram speak the person's languague in their own voice.
As per a report by Futurism the mixture of neural networking and mixed reality made this demo possible. Microsoft created an incredibly life-size hologram of Microsoft executive Julia White and replicated her native tongue using a translator. The technology has wide implementations such as having a person deliver a speech to a different location without having to leave their own place.
Microsoft has earlier showed of holograms before but the translation aspect of the technology is a first from the company. Currently, it appears to be a developmental project as of now but with Microsoft's vast resources it may soon become commercial reality.