I adapted sshify-windows.bat by Nate True to facilitate language installation.
You can download v0.6.3 from here
v0.0 this version doesn't work if you have not install ssh tool previously.
v0.1 fixed this bug.
v0.1.1 there is one file missing in v0.1.
v0.2 move Wallpaper.strings to right place (/System/Library/PreferenceBundles/Wallpaper.bundle/English.lproj)
APPLE put this file at /System/Library/PreferenceBundles/Wallpaper.bundle/
Thanks to jerrylee 's finding
v0.2 Thanks to jerrylee's sharing, this archive contains a complete translation files of zh_TW.
v0.2.1 there is one file "mv" missing in v0.2. Need this file to move Wallpaper.strings to right place.
v0.3 Changed languagespack folder organization. One folder for one language translation.
Thanks to mycintosh's sharing, this archive contains a complete translation files of German.
v0.3.1 Include jerrylee's zh_TW package update and add ReadMe.txt file
v0.3.2 Include jerrylee's zh_TW package update
v0.3.3 Include lamanodedios's Spanish package
v0.3.4 Include lamanodedios's Spanish package update (0920)
v0.3.5 Include lamanodedios's Spanish package update (0921)
v0.3.6 Include lamanodedios's Spanish package update (0925)
v0.3.7 Include lamanodedios's Spanish package update (0926)
v0.3.8 Include lamanodedios's Spanish package update (0926-2)
v0.4.0 Include giotheedge's Italian package (0829)
v0.5.0 Include CrUmp's zh_CN package (1002)
v0.6.0 Include nito's Portuguese package (1009)
v0.6.1 Include lamanodedios's Spanish package update (1013)
v0.6.2 Include lamanodedios's Spanish package update (1018)
v0.6.3 Include nito's Portuguese package update (1019)
a. jerrylee's translation of zh_TW which under "./languagespack/zh_TW" folder. http://blog.roodo.com/myilife
b. mycintosh's translation of German which under "./languagespack/de" folder. http://blog.mycintosh.com/
c. lamanodedios's translation of Spanish which under "./languagespack/es" folder. http://www.myspace.com/hernanii
d. giotheedge's translation of Italian which under "./languagespack/it" folder.
e. CrUmp's translation of zh_CN which under "./languagespack/zh_CN" folder.
f. nito's translation of Portuguese which under "./languagespack/pt" folder. http://www.hardblogmp3.blogspot.com
To install language to iphone, just launch iLangs.bat and select the language you want.
Note that only English, zh_TW, German, Spanish, Italian, zh_CN, and Portuguese are valid in the language selection for this archive.
For other languages, you need to create it yourself under ./languagespack folder.
Here is the screen shots of iLanguage batch.
If you see error message like this
"Problem registering main callback: -402653180"
you need to reboot your computer and iphone first. And do it again.
*1: The chinese characters are messages from OS.
*2: You need to jailbreak your iPhone first.
*3: This may not work under iPhone Firmware 1.1.1 since the file structure might change a lot.
If you want to help translating language that is not available, go to here, download the original string files(about 90 files), and translate.