core/plugins/org.eclipse.dltk.debug.ui/src/org/eclipse/dltk/internal/debug/ui/interpreters/messages.properties

EnvironmentVariableContentProvider_overwriteVariableMessage=A variable named {0} already exists. Overwrite?
EnvironmentVariableContentProvider_overwriteVariableTitle=Overwrite variable?
EnvironmentVariablesFileUtils_incorrectFormat=Incorrect file format at line {0}