Note that 'billion' and 'trillion' themselves have multiple meanings [1] [2], even though most people use only the short scale.

[1] https://en.wikipedia.org/wiki/Billion

[2] https://en.wikipedia.org/wiki/Trillion

Yeah. It's called the long and short scale:

https://en.wikipedia.org/wiki/Long_and_short_scales

Historically, in the UK, Australia, and other countries, "one billion" meant "one million million" (i.e. 1,000,000,000,000). Officially, at least in the UK, it now means the same as the US (i.e. 1,000,000,000)