Option 1
You can send the language setting as a command line argument when executing SQL Developer, so you can make it use a specific language by just modifying the shortcut’s target, like this:
"C:\Program Files\sqldeveloper\sqldeveloper-21.2.1.204.1703-x64\sqldeveloper\sqldeveloper.exe" --AddVMOption=-Duser.language=en
Please note that those are two hyphens before AddVMOption, but only one after the equal sign. Also, your shortcut’s target is probably different because it depends on the route where you unpacked the installer, so, don’t pay much attention to the whole path in my example, and just add " --AddVMOption=-Duser.language=en" at the end of your current shortcut’s target.
Option 2
- Close SQL Developer, if it is running.
- Go to the installation folder.
- Once there, edit sqldeveloper\sqldeveloper\bin\sqldeveloper.conf
- To change the language add this line (there is not a specific place to put this new setting)
AddVMOption -Duser.language=en