Thanks for an excellent initiative! This is a much needed function on many social networks where you don't want to expose the users e-mail address.
I tried the plugin and translated it into Swedish. Looked allright and the appropriate .po and .mo file was created in the /includes/languages/ directory. However, the plugin still shows the English words all over the settings and in the front end. Any thoughts? The rest of my site is in Swedish. I used Codestyling Localization to translate, and the text domains seemed alright.