How to distinguish between a system keyboard and 3rd party keyboard extension?

from

Code Block swift
UITextInputMode.availableModes

get something like

Code Block 
([UITextInputMode]) $R34 = 2 values {
	[0] = 0x0000000280dd2080 {
		baseUITextInputMode@0 = {
			baseNSObject@0 = {
				isa = UIKeyboardInputMode
			}
		}
		isDisplayed = true
		_extensionInputModeHasDictation = false
		_primaryLanguage = 0x99bdc31431ea3fe5 "en-GB"
		_languageWithRegion = 0x99bdc31436ca3fe5 "en_GB"
		identifier = 0x00000002820c52f0 "en_GB@sw=QWERTY;hw=Automatic"
		normalizedIdentifier = 0x99bdc31436ca3fe5 "en_GB"
		softwareLayout = 0x99b852756769aca6 "QWERTY"
		hardwareLayout = 0x9a99c33c2138dd59 "Automatic"
		_multilingualLanguages = 0x0000000282279e90 2 elements
	}
	[1] = 0x0000000280dd20d0 {
		baseUIKeyboardInputMode@0 = {
			baseUITextInputMode@0 = {
				baseNSObject@0 = {
					isa = UIKeyboardExtensionInputMode
				}
			}
			isDisplayed = false
			_extensionInputModeHasDictation = false
			_primaryLanguage = 0x99bdc20511ea3fe5 "en-US"
			_languageWithRegion = 0x00000001dd183f90 "en_US"
			identifier = 0x0000000283bbc2c0 "com.bitstrips.imoji.BitmojiKeyboard"
			normalizedIdentifier = 0x0000000283bbc2c0 "com.bitstrips.imoji.BitmojiKeyboard"
			softwareLayout = nil
			hardwareLayout = nil
			_multilingualLanguages = nil
		}
		_extension = 0x00000002819b9600
	}
}

How can I distinguish these two? I want to use the system keyboard, , but they all have English as the primary language.
BTW, the second one is actual a emoji keyboard.

the first one is UIKeyboardInputMode, and the second one is UIKeyboardExtensionInputMode, UIKeyboardInputMode and UIKeyboardExtensionInputMode are private api.