This issue has already been handled and is a feature of Weaver Xtreme Plus.
We have no plans to add the alternative to Weaver Xtreme free version.
You can specify any thing you want for the Hamburger / Menu label if you use Smart Menus with the Weaver Xtreme Plus plugin.
There is an option on the Appearance : Xtreme Plus option menu. Under the “Smart Menus” tab, there is box to provide HTML for any label you want for the mobile device menu button. Default is the hamburger, but if you want the word “MENU”, then just fill in the option with MENU.