Now type in your Own Language using Google IME

Google Transliteration IME is an input method editor which allows users to enter text in one of the supported languages using a roman keyboard. Users can type a word the way it sounds using Latin characters and Google Transliteration IME will convert the word to its native script. Note that this is not the same as translation -- it is the sound of the words that is converted from one alphabet to the other, not their meaning. Converted content will always be in Unicode.

Google Transliteration IME is currently available for 22 different languages -Amharic, Arabic, Bengali, Farsi (Persian), Greek, Gujarati, Hebrew, Hindi, Kannada, Malayalam, Marathi, Nepali, Oriya, Punjabi, Russian, Sanskrit, Serbian, Sinhalese, Tamil, Telugu, Tigrinya and Urdu.

If you are Done with installation then follow simple steps to activate it. Before that just press Left Alt + Shift of your keyboard and try typing in your language anywhere . . If it works then no need to do following things :)

Enabling Language Bar

If the 'Language bar' option is not visible in 'Toolbars', then it needs to be enabled through control panel: 

Windows 7/Vista

1. Control Panel -> Regional and Language Options -> Keyboard and Languages tab
2. Click on Change keyboards... button to open Text services and input languages dialog
3. Navigate to Language Bar tab
4. Enable the radio button Docked in the taskbar under Language Bar section
5. Apply all settings and try to display language bar as mentioned in previous section.

Windows XP

1. Go to Control Panel -> Regional and Language Options -> Languages tab -> Text services and input languages (Details) -> Advanced Tab
2. Make sure that under System configuration, option Turn off advanced text services is NOT checked.
3. Go to Control Panel -> Regional and Language Options -> Languages tab -> Text services and input languages (Details) -> Settings Tab
4. Click Language Bar
5. Select Show the Language bar on the desktop. Click OK.
6. If you are installing the IME for East Asian language or Right-To-Left language, go to Control Panel -> Regional and Language Options -> Languages Tab
7. Make sure that options Install files for complex scripts and right to left languages and Install files for East Asian languages are checked in the checkboxes. This requires installation of system files and the system will prompt to insert the Operating System Disc.
8. Apply all settings and try to display language bar as mentioned in previous section.

IME Shortcut

A shortcut key sequence can be applied to the IME as follows which can be used to quickly enable IME for any in-focus application: 

Windows 7/Vista

1. Control Panel -> Regional and Language Options -> Keyboard and Languages tab
2. Click on Change keyboards... button to open Text services and input languages dialog
3. Navigate to Advanced Key Settings tab
4. If Google <Language> Input is not listed in Installed Services box, then click Add and in Add Input language dialog box, go to the language for which you want to enable IME in the languages tree and expand the node. Check the checkbox next to Google <Language> Input in the list.
5. In Hot keys for input languages Select To <Language> - Google <Language> Input
6. Press Change Key Sequence
7. Select Enable Key Sequence
8. Select option like Left ALT + SHIFT + Key 1
9. Apply all changes
10. Now opening an application like notepad and pressing Left ALT + SHIFT + Key 1 should open the IME.

Windows XP

1. Control Panel -> Regional and Language Options -> Languages tab -> Text services and input languages (Details) -> Settings Tab
2. If either <Language> or Google <Language> Input not listed in Installed Services box, then click Add and in Add Input language dialog box, select <Language> in Input language and Google <Language> Input in Keyboard layout/IME. Click OK
3. Press Key Settings
4. In Hot keys for input languages, Select Switch to <Language>-Google <Language> Input
5. Press Change Key Sequence
6. Select Enable Key Sequence
7. Select option like Left ALT + SHIFT + Key 1
8. Apply all changes
9. Now opening an application like notepad and pressing Left ALT + SHIFT + Key 1 should open the IME.

Source : Google

Thanks :)