The big difference in Install Size between the PC version and the Xbox One version of Titanfall has been finally explained. While the new Microsoft’s console takes about 20 GB of space for the game’s installation, the PC version occupies 50 GB on one’s hard disk.
The explanation is that the PC version unpacks a whopping 35 GB of audio, after the instalation, because it includes the all languages files. Above this, to unpack them takes a long time. This has been discovered by Gone Gonzo user of The Escapist forum, who took a screenshot of the unpacking process.
It would have been great if there was a possibility to choose the language before the installation, but a least the difference in install size is not caused by the visual differences.