system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do numbers 11 through 19 have a different syntax to every other number?

As they don't follow the same formatting as twenty-(1-9), or one-hundred [and] (1-9) as examples in speech. Shouldn't they be named Tenthy-five, as an example. It's also partially true in other languages, such as French, why do we do this?
gpt
Eleven and twelve are from old, old words probably meaning something like 'one/two left [after you take away ten]'.

Thirteen -- nineteen are basically 'three-ten' -- 'nine-ten'. You can think of them as being said with a strange accent.