The purpose of showing keyboard equivalents in this menu is exactly the same as the purpose of showing keyboard equivalents in any other menu: so that people know what they are. Hiding the keyboard equivalents here (or, even worse, showing them as a tooltip) wouldn't fix the bug in any of the other menus where it occurs. And it's not sensible to pick and choose whether to show a keyboard equivalent for an item based on how wide the menu's other items happen to be in English.
The purpose of showing keyboard equivalents in this menu is exactly the same as the purpose of showing keyboard equivalents in any other menu: so that people know what they are. Hiding the keyboard equivalents here (or, even worse, showing them as a tooltip) wouldn't fix the bug in any of the other menus where it occurs. And it's not sensible to pick and choose whether to show a keyboard equivalent for an item based on how wide the menu's other items happen to be in English.