Steps to Reproduce:
Open the homepage in Czech (e.g. https://test.wikipedia.org/wiki/Special:Homepage?uselang=cs)
Actual Results:
The button in the start module for creating your userpage extends over the side of the start module because the translation is so long. This is with me using the full width of my laptop's screen.
Expected Results:
The button fits inside the module or the module is large enough to fit it.
Note: this is important to try to address before the May 2 release, because all Czech users will experience this -- it does not only happen when the window is compressed.