This has been happening the last few months. Most of my messages up with something lik ( (flag:gb) \u003e.\u003e ) or ( (flag:gb) estimate ) or anything like that. It's really annoying and I don't know whats going on. Any answers on how to stop it would greatly be appreciated.
Have you installed Clownfish or another similar translation application?
In Skype open Tools -> Options -> Advanced settings. At the bottom of this screen you should see a menu item saying “Manage other programs access to Skype”. Click on this menu. Do you now see any applications listed there?
Clownfish is responsible for this auto-translation of your messages to English. If you uninstall this application, the issue will be solved. You may also look for configuration options in Clownfish which may stop this auto-translation.