It is dict.cc and I still use it frequently. Also I sometimes submit word pronunciations.

Honestly, Tuxedo Computers and Framework I think do that.

Is there a way to install multiple languages? I am would be using German and English, sometimes Italian.

As far as I can tell that mouse has an integrated battery, not easily replaceable

If you find a good League of Legends replacement, let me know please. I tired dota, but the animations and controls feel very clunky.