Uninstalling a language installed in Settings?

Hi everyone.

Yesterday I installed a language on my hosted WordPress site. (My hope was that if the language was installed but not used, my translator plugin would “recognize” the language on the site and not try to translate over the previous translation…didn’t work.)

The problem is that if this language is selected in the plugin now, the whole site goes French–dashboard included. I tried an English dashboard plugin, and it didn’t work. Ideally, I would like to just uninstall the language instead of deleting it totally, but if I have to delete it, I will. I’m just really nervous to poke around in functions code if I don’t know what I’m doing. Help would be appreciated.

Thanks!