There are currently many (Low-level) UI architectures that i think feet your
needs but they don't have native Persian support  for devices like SE and
Motorola. you should handle rtl languages at your code.
some of more advanced frameworks are:
The newly introduced framework from sun is LWUIT and that is opensource and free
for commercial use and it's architecture borrowed from swing.
another framework is j2mepolish from a German company and is not free  for
commercial use.
finally a great framework TWIK from a UK based company that is not opensource
and isn't free but really it is so great and powerful.

MWT is one of the easiest and flexible open source library also you can use J4me and royal library named J2ME Polish but this one is heavy and has some buges

the good j2me  framework that i've seen is j2mepolish ( http://www.j2mepolish.org
) take a look at it.
the bad thing about this framework is: i didn't see any support  of maven,
probably you have to customize maven project  for yourself if you want to use
maven!
about the persian, i just wrote a simple project on mobile  and without any
special consideration it works perfect on persian  feature that supported by the
mobile itself. i checked that on sony ericsson series such as K700i, K750i and
K850i (CLDC 1.1, MIDP 2.0)