[baliex]

> If you can remember it any modern computer can guess it in a short time.

That's not true. A long sentence of your choosing is easy to memorise and plenty long enough to not be able to be guessed by a computer (brute force).

[bluGill]

That isn't a word though.

[number6]

As a German I have access to words like "Moselschifffahrtspolizeimützenverordnung" and that's a mild one :)

[bluGill]

Stupid German proving me wrong with something that most languages don't have access to.

\s

I'm sure German is not alone, but it is the only one I'm aware of - though with over 7000 known languages I doubt anyone knows enough to state anything with confidence.

[number6]

I believe Sanskrit has some very long words like 600 Roman letters or something