Easy TL/Search for subtitles
Get PotPlayer https://potplayer.daum.net/
After it's installed, open it and press F5 to open the preferences screen, then go to Subtitles > Word Searching
You will have different options than me because mine's already setup in the screenshot above, to add options click Add
then fill it like this:
Google TL
DeepL
The search engine at the top of the list is your default one, so make sure to order it properly!
After you finish setting this up, save everything then open any video file with EXTERNAL subtitles, hardsubs will not work for obvious reasons.
If you didn't mess with the default settings you should be able to click on your subtitles after the video is paused like the example below:
You can right click for the other search engines!
You can use this method for other languages too, for example Google
option for english words you don't know