[megaloman]

Код:

@Echo Off
cls
	Set "FileIn=Z:\Box_In\непостоянный файл.txt"
	Set "Fsprav=Z:\Box_In\постоянный справочник.txt"
	Set "WordIn=слово\"

	>nul 2>&1 Find "=%WordIn%" "%FileIn%" &&(Echo File "%FileIn%" has already been processed &Pause &Exit /B)

	>"%FileIn%.tmp" (FOR /F "usebackq tokens=1* delims==" %%i In ("%FileIn%") DO (
		If "%%j"=="" (Echo %%i
		) Else (
			<nul Set /P Str=%%i=%WordIn%
			FindStr /B /I "%%j " "%Fsprav%" ||Echo %%j
		)
	))
	>nul Move /Y "%FileIn%.tmp" "%FileIn%"
pause
Exit /B