what is language.translate?

language.translate is a simple and elegant solution to help you automatize the translation of strings and text inside your game given a JSON file as source.

why should i use it?

It's really simple to use and super quick to implement even on a complex project; it offers native support for 20 different language codes ( en, fr, it, es, es-419, de, pt, pt-br, hu, ro, pl, bg, ru, nl, cs, no, sv, da, ar, tr ) and infinite customizable extra language codes. With this plugin translations are as easy as calling the language.translate(" ") expression, and as a bonus if you have a lot of static text do not worry, because  language.translate offer autotranslation from the JSON source to any text or spritefont object! Both "language : string" and "string : language" JSON format are supported, just select your preferred one in the plugin settings!

does it work with construct 3's free plan?

Currently the free version of construct 3 isn't allowing for 3rd party plugin installs, so you are required a license.