Is there a minified version of speak.js which speaks English (US) only?

[ShirleyAquaria]

Hi! I am a developer of an online lexicon dictionary. It's for a minority language in Nepal. Impressed by this project, I would like to add the impressive speak.js into the website for the english explanation, but my concern is that a 7MB package with over 2MB main .js file could be a big drawback to loading speed. Anyway, I will only need the English(US) version of it and there won't be a need to adjust speed and pitch. Dear krispken, would mind introduce me a way to minify the source code according to this need? Thanks a lot!