Here is the entire iroha poem:

いろはにほへと
ちりぬるを
わかよたれそ
つねならむ
うゐのおくやま
けふこえて
あさきゆめみし
ゑひもせす

Japanese has moved on a bit since this was written a thousand years ago. Some characters like ゑ are now obsolete. Another character ん has since entered common use.

Professor Ryuichi Abe translates iroha to English thus:

Although its scent still lingers on
the form of a flower has scattered away
For whom will the glory
of this world remain unchanged?
Arriving today at the yonder side
of the deep mountains of evanescent existence
We shall never allow ourselves to drift away
intoxicated, in the world of shallow dreams.

I think this is a bit more poetic than the one about the zho buck.

There's really nothing like this in Alphabetic languages. Iroha is used a bit like Roman numerals are in the West. As Japanese doesn't have an innate order to its syllabary the way Latin does, "iroha" became the de facto ordering, a bit like "A-B-C" does in English, and there are some parallel semantics.

I'm curious if other syllabaries have trodden this path. Cherokee? Canadian Aboriginal languages using the syllabic script? Linear B?