why two resource file in class library create two dlls in debug folder

Question

I add two resource files to support English and French languages when I build class library in visual studio in debug folder create two dlls something like this:

/debug/commonlibrary.dll
/debug/fr/commonlibrary.dll

Is there any way to have one dll for two resources? my default resource file has interanl access modifier and french resource has no code generation.