The exact features of this applet have yet to be determined, but it will generally just provide simple quick translation results.
This could be provided by using a specific search pattern, such as:
en-nl: I like trainswhich would translate I like trains from English to Dutch.
We would need to find a free, credentialless API that would allow for translation, which may be challenging if not impossible. LaunchMenu doesn't have a back-end in which it can securely hide credentials however, so if this isn't feasible we might need to find another way to achieve this.