About 10% of my movie library is not matched

[theguymadmax]

In the example you gave, the title doesn't match the TMDB.

This correctly identifies
Who Wants to Kill Jessie (Kdo chce zabít jessii) [1966]

Would also second the use of media provider identifiers:

Code:

Film (2010) [imdbid-tt0106145]

or

Code:

Film (2018) [tmdbid-65567]