It’s just 31.7MB unpacked (!) and has phpMyAdmin, MySQL, Perl, PHP, Apache… And a "plugin" architecture that allows adding some others things. XAMPP is no doubt a great solution, and well-established, but I like Uniserver’s tiny footprint and remarkable production grade strength / performance better. Matter of preference, not really an "objective" scale to apply. Pity it’s somewhat lesser known; the lead developer / maintainer (Olajide Olaolorun) deserves a statue!
Hope the .po file works for you. Let me know when the added string is available so I can add that one as well.