ScraBot

You can play here

Tilesets and dictionaries are available in 17 languages - the translation of the user interface will be your job, though. There are some fancy features as well, such as Telegram notifications and timed play. As always, feedback is very welcome. ScraBot is currently a Python web-only application (I've made registration and login as painless as possible). Once all the wrinkles have been ironed out, I will publish it as a desktop app.

Screenshots

Game in English with no time limit

And yes, of course you can play in Klingon!