We see your exact Dalvik problem on deepl.com as well. We get a constant flood of those requests, sometimes subsiding. They are globally distributed, preliminary in lower-income countries. We have tried lots of things, like letting them just time out, returning different errors, redirecting of many sorts including Android intents, no solution. They now made it to our permanent blocklist and we just deal with the useless additional traffic. We are still hyper curious what on earth is loading us and for what reason though. AFAIK we couldn't see translation requests from them, just loading our website.