For layout of controls or other elements in a window, it is important to consider alignment in addition to expansion of text labels. In Hebrew and Arabic countries, information is written right to left. So when localizing for these countries, reverse your U.S. presentation.
Some languages include diacritical marks that distinguish particular characters. Fonts associated with these characters can require additional spacing.
In addition, do not place information or controls into the title bar area. This is where Windows places special user controls for configurations that support multiple languages.