Text Expansion Layout

Text expansion layout

Translated text rarely matches the source length. German and Finnish commonly run much longer than English, while Chinese and Japanese are shorter, and short strings expand proportionally most. A layout tuned to English breaks quietly everywhere else.

Method

1. Design to the longest plausible string, not the English one. Fixed widths sized to the source are the primary cause of clipped translations.
2. Let containers grow and wrap. Flexible layouts that reflow absorb expansion, while absolute positioning and single-line assumptions do not (see css-layout).
3. Give buttons and labels room without centring on emptiness. Minimum widths keep short translations from looking broken while allowing long ones to expand.
4. Never truncate meaning silently. If space is genuinely fixed, show the full text on hover or focus, and prefer wrapping to ellipsis for anything a user must read (see accessibility-review).
5. Test with pseudo-localised strings early. Padded pseudo text surfaces expansion breakage before any real translation exists (see pseudo-localization).
6. Watch the composite cases. Text next to an icon, inside a table header, or in a fixed navigation bar is where expansion collides with other constraints.

Boundaries

• Layout tolerance handles length; it does not handle direction, which is a separate mirroring concern (see rtl-layout).
• Some scripts need more vertical space per line, so height flexibility matters as much as width.
• Extremely constrained surfaces such as watch faces may genuinely require shorter source copy rather than a layout fix.