The key of the button on the World Optimization screen is inconsistent

The Bug

The World Optimization screen has buttons “Create Backup and Optimize” (optimizeWorld.confirm.proceed) and “I know what I'm doing!” (selectWorld.backupJoinSkipButton), but these keys are inconsistent.

Also, in some languages ​​the “I know what I'm doing!” button is translated as "Understand the risks and load" and the text doesn’t fit.

Observed Behavior

The key of “I know what I'm doing!” button isn’t cosistent with optimizeWorld.confirm.proceed.

Expected Behavior

A separate string should be added, and its key is consistent with optimizeWorld.confirm.proceed.