When the "Use compiler to Extract Swift Strings" is set to true, it extracts strings from the frameworks i have imported as well. How can i avoid this?

Why is the custom localized string macro name only allowed for Objective C and C code? I have a wrapper class for localization which is a Swift function. I'm unable to get the strings i pass to it localized. Is there any way to get it working other than writing an objective C class and adding it to the bridging header?