For multilingual testing – change your keyboard language in Windows
You can change the keyboard language from default English to Polish or Spanish etc., With this you can test your application or website for multilingual support and no need to ask the client to do so.
This will load up the Text Services and Input Languages dialog box. Here you will see the list of installed services and keyboards on your computer. You can click Add to install a new keyboard layout and input language.
Choose the input language and choose the type of keyboard that you have attached to your computer. If you want to type Spanish on an English keyboard, choose Spanish as the Input language and United States-Dvorak.
In Vista, you have to click on Regional and Language Options from the Control Panel. Then you need to click on Keyboards and Languages and then Change Keyboards.
Under Installed Services, click Add, and then choose the input language and keyboard layout. That’s about it! So if you want to type in another language, such as a foreign language, or if you want to switch the keyboard language back to English, the above steps should solve your problem!
Few example characters,
Ą ->alt + a
ć ->alt + c
ę ->alt + e
ł ->alt + l
ń ->alt + n
ó ->alt + o
ś -> alt + s
ż ->alt + z
ź -> alt + x