add language setting for tesseract

src/paperless/settings.py

@@ -126,6 +126,9 @@ USE_L10N = True
 USE_TZ = True
 
 
+# Tesseract language setting
+TESSERACT_LANGUAGE = "eng"
+
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/1.9/howto/static-files/