If you do not want to display non translated tt_news record then you must have to set below typoscript
plugin.tt_news.sys_language_mode = strict
if you want to display default news record then you have to set “content_fallback” as system language overlay
config.sys_language_overlay = content_fallback
it will be better if you use “plugin.tt_news.sys_language_mode = strict”.
If you have any queries, please do not hesitate to contact me at Jainish Senjaliya