Here is many software that can installed on the Acer Liquid Express E320 (Acer C6).
1. Yoolki Arabic Keyboard – Firefox Addon on Acer Liquid Express E320 (Acer C6). Just open right click any text field and select "Write Arabic here" to write in Arabic using an English keyboard. The add-on can transliterate your English letters (ex: akala el waladou el touffA7ah to أَكَلَ الوَلَدُ التُفاحَة) or translate English to Arabic using Google translate. (ex: The boy ate the apple).
Here this link : http://supportscentre.com/free-download-yoolki-arabic-keyboard-firefox-addon-for-android.html
Note : You must have software requirement for addon : Fire fox mobile
2. Download here Arabic Language Pack for AnySoftKeyboard Acer Liquid Express E320 (Acer C6)
Here this link : http://supportscentre.com/arabic-language-pack-for-anysoftkeyboard-version-20110127.html
3. Download Arabic soft Keyboard for Acer Liquid Express E320 (Acer C6) Smartphone
Here this link : http://supportscentre.com/arabic-soft-keyboard-abdullah-bahitham.html
4. Or find out more application from google play (android market) :
https://play.google.com/store/search?q=arabic+keyboard&c=apps
