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Does this plugin support other languages?

Yes, it does. See the WordPress Codex for details on how to make a translation file. Then just place the translation file, named car-[value in wp-config].mo, into the plugin's folder.

I love your plugin! Can I donate to you?

Sure! I do this in my free time and I appreciate all donations that I get. It makes me want to continue to update this plugin. You can find more details on my donate page.