Having taught Windows, iX, and OS/2 in assorted firms' networked systems, the general feed-back and systems problems from customers gave me a good insight in matters OS.
MS SW has always been pricey, then firms have to cough up a licence fee, reflecting number of PCs used: a never-ending money source. With its closed-shop approach and early entrance to the market, MS effectively dictated SW 'standards'.
Disenchantment saw the rise of Open-Source, both for Office and OS. As such, thousands from many countries contribute by offering mother-tongue translations of the GUI terms and programs. I ditched MS and have been enjoying the robust and well-thought-out design and programming of Ubuntu's multi-program packet.
The first burden one no longer has is being forced to accept Americanisms in terminology, grammar, etc. What a blessed relief to have British English.
Another very useful factor is that the Ubuntu packet is heaving with a vast spectrum of reliable programs. All costing nothing and all license-free.
As others here have pointed out, one **can** run Ubuntu from a thumb-drive. Both WinX and Ubuntu can be installed parallel. But I soon jettisoned the former.