How to Set Snow Leopard’s Language & Text preferences
Mac OS X Snow Leopard lets you control the fonts and languages of the text that appears on your screen. To change your text and language settings, open System Preferences by clicking the gear icon on the Dock and then Open the Language and text pane.
Language: Choose the preferred order for language use in menus and dialogs as well as the standards that Mac OS X will use for each script style.
Text: Specify character combinations that will be automatically replaced with special characters. You can also choose a language for spell-checking and turn on smart quotes (where Snow Leopard chooses double or single quotation marks for you).
Formats: Find these settings here:
Dates: You can select a region and use its date conventions (month-day-year versus day-month-year) or you can click the Customize button to build a custom format for both the long date (Saturday, September 24, 2005) and short date (9/24/2005) used throughout Mac OS X. The changes you make are reflected immediately in the sample box at the left.
Times: Click Customize to select a region to use the preset time conventions. You can choose 12-hour or 24-hour (military) time formats, change the time separator (colons, a period, or a dash), and specify different suffixes for morning (a.m.) and evening (p.m.).
Numbers: These convention settings determine the separators used for large numbers or numbers with decimals, as well as the currency symbol that you want to use and where it appears in a number. You can also choose between standard (U.S.) and metric measurement systems.
Input Sources: Each check box toggles the keyboard layouts available from the Input menu. (To display the Input menu on the Finder menu bar, click the Show Input Menu in Menu Bar check box to select it.) Click the Keyboard Shortcuts button to toggle the shortcuts for switching layouts and input methods.