To handle text expansion in multi-language GUIs:

1. Design flexible layouts: Use dynamic layouts that adapt to varying text lengths.

2. Use relative sizing: Instead of fixed pixel sizes, use relative units like percentages or ems.

3. Avoid fixed-width containers: Use containers that expand or contract with content.

4. Implement text wrapping: Allow text to wrap to the next line when it exceeds container width.

5. Use ellipses or truncation: Shorten long texts with ellipses or truncation to maintain layout.

6. Increase container size: Dynamically increase container size to accommodate longer texts.

7. Use scrolling: Add scrollbars or scrolling containers for excessively long texts.

8. Prioritize content: Focus on essential content and truncate or hide less important text.

9. Use language-specific formatting: Apply language-specific formatting rules, like hyphenation or justification.

10. Test thoroughly: Test GUIs with various languages and texts to ensure adaptability.

11. Use translation memory tools: Leverage tools that remember translations and adapt to text changes.

12. Plan for worst-case scenarios: Design for the language with the longest average text length.

By implementing these strategies, you can effectively handle text expansion in multi-language GUIs, ensuring a seamless user experience across languages and cultures.