I'm from Sweden and did set Swedish as default language in my profile.
When I change my profile to English I can now see the menu in editor.
There is a little problem with the language settings in WB. WebsiteBaker use "se" as language code for the swedish language, but the CKEditor use "sv" instead of the "se". Both program's use an ISO-Code, but not the same

a simple solution is a copy of the original swedisch language file in the ckeditor in
modules/ckeditor/ckeditor/langopen this file with a simple editor like Notepad or notepad++, save it as
se.js, open this
se.js again and change the first part
CKEDITOR.lang['sv']
to
CKEDITOR.lang['se']
thats all. Maybe, you've to clear the browser-cache, but try it at first with a simple reload of the page with the editor.

this solution is upgrade-safe, but it is recommended, to do the same after the next upgrade, so that you have the latest language file version everytime.
P.S.: some of the plugins has also language files, any of them also in swedisch, but with the wrong filename. For example the plugin
placeholder in
modules/ckeditor/ckeditor/pluginscopy the existed file sv.js, rename it to se.js, change the language code in the first line (see my code example in the top). thats all
if you want, take a look into the folders from every plugin. a couple of them use a folder, called "lang". if you found there no file in your language (means sv.js or se.js), copy the en.js, rename it to se.js, change the language code in the first line (my example) and translate it line by line.