Helpful when host platform does not support localization, i.e., works with US ASCII only. Old dirty hack.
Older release (latin2) is known to work with Squeak versions 3.4 - 3.7. The newer version (unicode) works with Squeak 3.8 and above.
Shift-Alt-"\" switches CZ/US keyboard. In CZ mode, the first row (1234567890) is mapped to +ì¹èø¾ýáíé, with Shift to 1234567890 with Shift-Alt to !!@#$%^&*(). + is mapped to "hacek"/"krouzek" (dead key), = is mapped to "carka" (dead key). With Alt special squeak editor commands are available (untouched). Other keys are the same as in US keyboard.
Other suggested packages: ISO-8859-2 or DejaVu fonts.