When localizing software also it's a general rule of thumb that your on-screen UI spaces need to be something like 40% bigger than the English text that goes in them since the German equivalent is always going to be way bigger. It's common for it to turn out half-way through localization that some of your text doesn't fit anymore.

(FWIW, this also happens when swapping from ideographic languages to English - western localizations of Japanese video games often end up with very small text as a result.)