To customize the appearance you can add the optional parameters header=HEADER (default: Wikipedia:Babel), footer=FOOTER (default: Search user languages), bordercolor=BORDERCOLOR (default: #99B3FF), color=COLOR (default: white), textcolor=TEXTCOLOR (default: black), left=Left margin (default: 1), bottom=Bottom margin (default: 0.5), solid=Solid border width (default: 1), width=Box width (default: 248), and/or extra-css=<any other formatting>. Call the '!' userbox to start a new column after that point or the '-' userbox to insert a blank row. You may also use '|align=left' to display the babel box on the left side of the screen rather than the default right. Boxes with parameters can be added at the end with the format, "|special-boxes={{box page name|param1|param2}}{{second page name|param1|param2|param3}}". Any number of additional boxes can be added this way and will display below the others.
Example: {{Babel|align=left|color=yellow|en|km-1|fr|!|tl|ru|leet}} produces: